Matlab matrix of strings

Link to this comment ⋮ Link Direct link to this comment I have a folder which contains 389 CSV files. And each CSV file has a dimension of 82x1. So basically it's a 1D matrix. Now the first element (i.e. A1) of every CSV file is 'VAR'. Now I want to remove this 'VAR' and shift my matrix to the upside. That means I want to remove A1 element and shift the whole matrix from A1. How to do that. Direct link to this comment ⋮ Link Direct link to this comment @Supriya Gain try reading it into a table and deleting the first columnIf that doesn't work, start a new question of your own (not here) and attach one of the CSV files there. Sign in to comment. More Answers (1) Direct link to this answer ⋮ Direct link to this answer If A is your cell-array of strings, this oneliner will do the job:B = cellfun(@(x) x(1:end-5), A, 'un', 0) 2 Comments Direct link to this comment ⋮ Link Direct link to this comment Hi Jos,I am not good at in matlab, so i sound dumb for sure. I did what you had suggested and it worked for the first 3 characters, not for the last 3. i substituted it with x(6:9), but it gace me an error. anyhow, thanks! I will try to solve it somehow. much appreciated Direct link to this comment ⋮ Link Direct link to this comment For those who are wondering what 'un' is, it stands for 'UniformOutput'. Sign in to comment. See Also Categories Community Treasure Hunt Find the treasures in MATLAB Central and discover how the community can help you! Start Hunting! An Error Occurred Unable to complete the action because of changes made to the page. Reload the page to see its updated state.

Example: h = @(x)sin(x) M — Symbolic matrix variable to convert symbolic matrix variable Symbolic matrix variable to convert, specified as a symbolic matrix variable. Alternatively, you can use symmatrix2sym to convert a symbolic matrix variable to an array of symbolic scalar variables. Example: syms A 2 matrix; M = A^2 + eye(2) Data Types: symmatrixOutput Argumentscollapse allx — Variable symbolic scalar variableVariable, returned as a symbolic scalar variable.A — Vector or matrix with automatically generated elements symbolic vector | symbolic matrixVector or matrix with automatically generated elements, returned as a symbolic vector or matrix of symbolic scalar variables. The elements of this vector or matrix do not appear in the MATLAB workspace.symexpr — Expression or matrix converted from anonymous MATLAB function or symbolic matrix variable symbolic expression | symbolic matrix Expression or matrix converted from an anonymous MATLAB function or a symbolic matrix variable, returned as a symbolic expression or matrix of symbolic scalar variables. Data Types: symTipsStatements like pi = sym(pi) and delta = sym("1/10") create symbolic numbers that avoid the floating-point approximations inherent in the values of pi and 1/10. The pi created in this way stores the symbolic number in a workspace variable named pi, which temporarily replaces the built-in numeric function with the same name. Use clear pi to restore the floating-point representation of pi.sym always treats i incharacter vector input as an identifier. To input the imaginary number i,use 1i instead.clear x does not clear the symbolicobject of its assumptions, such as real, positive, or any assumptionsset by assume, sym, or syms.To remove assumptions, use one of these options:assume(x,"clear") removes all assumptions affecting x.clear all clears all objects inthe MATLAB workspace and resets the symbolic engine.assume and assumeAlso provide more flexibility for setting assumptions on variables.When you replace one or more elements of a numericvector or matrix with a symbolic number, MATLAB converts thatnumber to a double-precision number.A = eye(3);A(1,1) = sym(pi)A = 3.1416 0 0 0 1.0000 0 0 0 1.0000 You cannot replace elements of a numeric vector or matrix with a symbolic variable, expression, or function because these elements cannot be converted to double-precision numbers. For example, A(1,1) = sym("a") throws an error.When you use the syntax A = sym("a",[n1 ... nM]), the sym function assigns only the symbolic array A to the MATLAB workspace. To also assign the automatically generated elements of A, use the syms function instead. For example, syms a [1 3] creates the row vector a = [a1 a2 a3] and the symbolic variables a1, a2, and a3 in the MATLAB workspace.Alternative FunctionalityAlternative Approaches for Creating Symbolic VariablesTo create several symbolic variables in one function call, use syms. Using syms also clears assumptions from the named variables.Version HistoryIntroduced before R2006aexpand allR2022b: Convert symbolic matrix variablesYou can convert a symbolic matrix variable M of type symmatrix to an array of symbolic scalar variables symexpr of type sym by using symexpr = sym(M). For an example, see Convert Hessian Matrix.R2020a: sym("pi") creates symbolic variablesym("pi") now creates a symbolic variable

MATLAB is an abbreviation for "matrix laboratory." While other programming languages mostly work with numbers one at a time, MATLAB® is designed to operate primarily on whole matrices and arrays.All MATLAB variables are multidimensional arrays, no matter what type of data. A matrix is a two-dimensional array often used for linear algebra.Array CreationTo create an array with four elements in a single row, separate the elements with either a comma (,) or a space.This type of array is a row vector.To create a matrix that has multiple rows, separate the rows with semicolons.a = [1 3 5; 2 4 6; 7 8 10]a = 3×3 1 3 5 2 4 6 7 8 10You can also define each row on its own line of code and separate the rows with a newline.a = 3×3 1 3 5 2 4 6 7 8 10Another way to create a matrix is to use a function, such as ones, zeros, or rand. For example, create a 5-by-1 column vector of zeros.Matrix and Array OperationsMATLAB allows you to process all of the values in a matrix using a single arithmetic operator or function.ans = 3×3 11 13 15 12 14 16 17 18 20ans = 3×3 0.8415 0.1411 -0.9589 0.9093 -0.7568 -0.2794 0.6570 0.9894 -0.5440To transpose a matrix, use a single quote ('):ans = 3×3 1 2 7 3 4 8 5 6 10You can perform standard matrix multiplication, which computes the inner products between rows and columns, using the * operator. For example, confirm that a matrix times its inverse returns the identity matrix:p = 3×3 1.0000 0.0000 -0.0000 0 1.0000 -0.0000 0 0.0000 1.0000Notice that p is not a matrix of integer values. MATLAB stores numbers as floating-point values, and arithmetic operations are sensitive to small differences between the actual value and

MATLAB vs Mathematica is always a crucial battle for statistics students.They always wanted to know that which one is better between MATLAB vs Mathematica. Therefore we are going to show you the best ever comparison between these two programming languages to clear all your doubts.Let’s get started:-MATLAB is explicitly designed for the students , scientists, and also for the engineers who are using the programming platforms. Looking for MATLAB assignment help then don’t worry get the best assignment help now!This language is the same as the other languages, but it compiles very fast, and anyone can learn this language without doing a more in-depth study about languages.Its full form is matrix laboratory, but in the beginning, it says it as the matrix programming language.A natural computational mathematics form is allowed in Matlab, which plays the most important factor in Matlab.Top 5 Main Features of MatlabTable of ContentsTop 5 Main Features of MatlabTop 5 Main Features of MathematicaTop 7 Difference Between Matlab vs Mathematica You Must KnowHow Matlab vs Mathematica Is Different From Each Other The Table Underneath Abridges The Examinations Between Mathematica Vs MatlabConclusionFAQsQ1. What is the difference between Matlab and Mathematica?Q2. Which one should I choose – Matlab vs Mathematica?Here are the top 5 main features of MATLAB which are as follows:User-friendly interface for beginners.Built-in functions for matrix operations.Powerful graphics and visualization tools.Interoperability with other programming languages.The vast library of functions for various applications.Top 5 Main Features of MathematicaHere are the top 5 main features of Mathematica which are as follows:Mathematica is a comprehensive computational software that can perform various mathematical operations.It has a user-friendly interface that provides efficient and accurate solutions to complex mathematical problems.Mathematica allows for creating interactive and dynamic visualizations to help understand complex concepts.It has built-in libraries for various mathematical fields, such as calculus, linear algebra, and statistics.Mathematica supports programming in multiple languages, including its proprietary Wolfram Language, making it a versatile data analysis and modeling tool.Let’s have a look on the detailed comparison between MATLAB vs Mathematica:-Top 7 Difference Between Matlab vs Mathematica You Must KnowHere in this section, we provide the top 7 differences between MATLAB vs Mathematics that you must know:ParametersMatlabMathematicaDefinitionMatlab is a Matrix Laboratory that is used to computing the function or mathematical or technical calculation.Mathematica is also an application that is used for computations and also a paragon for use in mathematics, engineering, chemistry, physics, biology, finance, and a wide range of other fields. Mathematica gives a new way to communicate with the world of data.Programmed as:It was programmed in C++, C and Java languages. It was programmed in C++, OpenCL , CUDA and other platforms.InterfacingUsers get a good interface in the Matlab.Mathematica offers customization and intuitive visuals for introductions,

MATLAB provides a high-level language and development tools that let you quickly write MATLAB programs, develop and analyze algorithms, and build applications. MATLAB is a matrix-based language. It natively supports vector and matrix operations that are fundamental to engineering and scientific problems.For example, you can operate on all of the elements in a matrix with a single command without having to write a for loop. As a result, one line of MATLAB code often replaces several lines of C or C++ code.MATLAB provides features of traditional programming languages, including flow control, such as while and for loops; error handling, such as try catch blocks which allow us to execute statements and catch the resulting errors; and object-oriented programming. Here you can see a class defined in MATLAB together with its properties and methods.The MATLAB environment is well suited for algorithm design and exploration. In this example, we're developing an algorithm to identify the center of a hurricane. Because MATLAB is a high-level language there's no need to perform low-level administrative tasks, such as declaring variables, specifying data types, and allocating memory.Using the Command window, you can execute commands one at a time, providing you with immediate results. This interactive approach makes it easy to quickly explore multiple options and iterate to an optimal solution.You can create a MATLAB script or function from the commands you've already entered. This makes it easy to reuse and automate your work. MATLAB provides built-in algorithms for signal processing and communications, image and video processing, control systems, and many other domains. Here, we're using a function from Image Processing Toolbox™ to identify and measure properties of connected regions in an image.MATLAB provides development tools that help you implement your algorithms efficiently and optimize their performance. The MATLAB editor is where you create and edit programs. The editor provides debugging features. You can set breakpoints, examine variable values, and step through individual lines of code.The Code Analyzer automatically checks code in the MATLAB editor for problems. When you hover over underlined code fragments, the Code Analyzer provides an explanation of the problem and suggestions on how to fix it. The MATLAB Profiler measures the overall performance of MATLAB programs and identifies areas of code to focus on for improvement. The Profile Summary report gives information about the functions called, including the time each function took to run, how many times each function was called, and which lines of code took the most processing time.You can integrate your MATLAB applications with those written in other languages, such as C, C++, Java, and .NET. Here we have C code for a 2D Gaussian function. This code was compiled into a MEX function, or MATLAB executable, and can be called directly from within MATLAB. Similarly, you can call MATLAB code directly from your C, C++, or FORTRAN applications.MATLAB uses processor-optimized libraries for fast execution of matrix and vector computations. Many linear algebra and numerical functions are multi-threaded, allowing them to run faster on multicore computers. You can use the

Create symbolic variables, expressions, functions, matricesSyntaxDescriptionx = sym("x") creates symbolic scalar variable x.exampleA = sym("a",[n1 ... nM]) creates an n1-by-...-by-nM symbolic array filled with automatically generated elements. For example, A = sym("a",[1 3]) creates the row vector A = [a1 a2 a3]. The generated elements a1, a2, and a3 do not appear in the MATLAB® workspace. For multidimensional arrays, these elements have the prefix a followed by the element’s index using _ as a delimiter, such as a1_3_2.exampleA = sym("a",n) creates an n-by-n symbolic matrix filled with automatically generated elements.examplesym(___,set) creates a symbolic variable or array and sets the assumption that the variable or all array elements belong to set. Here, set can be "real", "positive", "integer", or "rational". You also can combine multiple assumptions by specifying a string array or cell array of character vectors. For example, assume a positive rational value by specifying set as ["positive" "rational"] or {'positive','rational'}.examplesym(___,"clear") clears assumptions set on a symbolic variable or array. You can specify "clear" after the input arguments in any of the previous syntaxes, except combining "clear" and set. You cannot set and clear an assumption in the same function call to sym.sym(num) converts a number or numeric matrix specified by num to a symbolic number or symbolic matrix.examplesym(num,flag) uses the technique specified by flag to convert floating-point numbers to symbolic numbers.example sym(strnum) converts the character vector or string specified by strnum to an accurate symbolic number without approximation.examplesymexpr = sym(h) createsa symbolic expression or matrix symexpr froman anonymous MATLAB function associated with the function handle h.example symexpr = sym(M) converts a symbolic matrix variable M of type symmatrix to an array of symbolic scalar variables symexpr of type sym.exampleExamplescollapse allCreate Symbolic VariablesCreate the symbolic variables x and y.Create Symbolic VectorsCreate a 1-by-4 symbolic vector a with automatically generated elements a1,...,a4.You can specify the format for the element names by using a format operator within the first argument. sym replaces %d with the index of the element to generate the element names.However, these syntaxes do not create symbolic variables a1, ..., a4, x1, ..., x4 in the MATLAB workspace. To access the elements of a and b, use the standard indexing methods.Create Symbolic MatricesCreate a 3-by-4 symbolic matrix with automatically generated elements. The sym function generates matrix elements of the form Ai,j. Here, sym generates the elements A1,1, ..., A3,4.A = (A1,1A1,2A1,3A1,4A2,1A2,2A2,3A2,4A3,1A3,2A3,3A3,4)Create a 4-by-4 matrix with the element names x1,1, ..., x4,4 by using a format operator within the first argument. sym replaces %d with the index of the element to generate the element names.B = (x1,1x1,2x1,3x1,4x2,1x2,2x2,3x2,4x3,1x3,2x3,3x3,4x4,1x4,2x4,3x4,4)These syntaxes do not create symbolic variables A1,1, ..., A3,4, x1,1, ..., x4,4 in the MATLAB workspace. To access an element of a matrix, use parentheses.Create Symbolic Multidimensional ArraysCreate a 2-by-2-by-2 symbolic array with automatically generated elements a1,1,1,…,a2,2,2.A(:,:,1) = (a1,1,1a1,2,1a2,1,1a2,2,1)A(:,:,2) = (a1,1,2a1,2,2a2,1,2a2,2,2)Create Symbolic NumbersConvert numeric values to symbolic numbers or expressions. Use sym on subexpressions instead of the entire expression for better accuracy. Using sym on entire expressions is inaccurate because MATLAB® first converts