I have a cell array of data pulled from field measurements. If the contents of the cells in a column of c have compatible sizes and types, then the corresponding table variable is the vertical concatenation of those contents into an array. Input array, specified as a numeric array, logical array, categorical array, datetime array, duration array, string array, or cell array of character vectors. This example shows how to create a categorical array. The only kind of array that does not use named fields that can have both numbers and strings is a cell array, and that is what raw already is, a cell array of numbers and strings. Convert cell array to ordinary array of the underlying. So if there is some good way to automate this process since the actual data is large enough to manually handle it.
But now i want to use that to find the corresponding value in another array and store it again, effectively creating a new 1x8 array. Id like to convert this into a numeric array, and have all of the nonnumeric values be converted to nan. However, when the input is a character array, double instead converts each character to a number representing its unicode value. If a is a numeric array, then char converts numbers into characters. Each column of c provides the data contained in a variable of t to create variable names in the output table, cell2table appends column numbers to the input array name.
Convert symbolic array to cell array matlab sym2cell. Convert logical values into numeric values matlab answers. Learn more about cell2mat, cell conversion, cell arrays matlab. C num2cell a converts array a into cell array c by placing each element of a into a separate cell in c. If not, would you find this functionality useful if it was added to matlab. In matlab, it is not possible to have a single numeric array that also stores strings. If the input array has no name, then cell2table creates variable names of the form var1. Feb 05, 2011 you asked to extract the name and put it in the first column and that the rest of the columns would be actual values. You can use the categorical function to create a categorical array from a numeric array, logical array, string array, cell array of character vectors, or an existing categorical array. Create a 1by11 cell array of character vectors containing state names from new england. Array that contains values assigned to categories matlab. The size of the resulting cell array corresponds to the size of the input matrix.
This data should be numeric, but it sporadically has non numeric e. A cell array is a data type with indexed data containers called cells. Cell to number array matlab answers matlab central. Apr 08, 2016 hi all, i am trying to convert a categorical array to a cell array so that i can use the strrep function, but i cant seem to find anyway to do it after scouring the web to the best of my abilities. Input cell array, in which all cells contain the same data type. You may assume that every element of a is an integer on the interval 1,k. Refer to sets of cells by enclosing indices in smooth parentheses. Jun 17, 2011 i have a cell array of data pulled from field measurements. Convert a matrix of symbolic variables and numbers to a cell array. Each cell contains an element of the symbolic matrix s.
Cody is a matlab problemsolving game that challenges you to expand your knowledge. Enclose indices in smooth parentheses, to refer to sets of cellsfor example, to define a subset of the array. If you include elements of unlike classes in a matrix, matlab converts some elements so that all. Numeric array to cell array of strings easy matlab. I know i would the times that ive wanted to use this construct are very similar to the times that you use. T cell2tablec converts the contents of an mbyn cell array, c, to an mbyn table, t. There seems to be no way of telling matlab that i want it to convert as variable to a cell array. Given a numeric array a and a 1xk cell array of strings c, return a cell array b that is the same size as a and. Convert this matrix to a cell array by using sym2cell. Determine whether input is numeric array matlab isnumeric. Matlab represents infinity by the special value inf as a double type create several calculations that return nan and assign the results to an array. Tf isnumerica returns logical 1 true if a is an array of numeric data type. Input a of class cell and input b of class char must be cell arrays of strings, unless one is a string.
Cell arrays commonly contain either lists of character vectors of different lengths, or mixes of strings and numbers, or numeric arrays of different sizes. Oct 30, 2019 there seems to be no way of telling matlab that i want it to convert as variable to a cell array. Convert cell array with numeric and nonnumeric data into. How can i convert a cell array into a numeric array in matlab. Cell arrays commonly contain either lists of text, combinations of text and numbers, or numeric arrays of different sizes. If you include elements of unlike classes in a matrix, matlab converts some elements so that all elements of the resulting matrix are of the same type. Mathworks is the leading developer of mathematical computing software for engineers and.
These categories can have a natural order, but it is not required. Create categorical array from cell array of character vectors. Convert cell array with numeric and nonnumeric data into a. I have found the index from each individual table in the cell array. C num2cell a,dim splits the contents of a into separate cells of c, where dim specifies which dimensions of a to include in each cell. Hi all, i am trying to convert a categorical array to a cell array so that i can use the strrep function, but i cant seem to find anyway to do it after scouring the web to the best of my abilities. A cell array is a data type with indexed data containers called cells, where each cell can contain any type of data. Tf isstrpropstr,category,forcecelloutput,tf, where tf is 1 true, returns tf as a cell array even when str is a character array, string scalar, or numeric array. There are two ways to refer to the elements of a cell array. Using cell array to find corresponding values of a numeric.
Input array, specified as a string array, character array, cell array of character vectors, or numeric array. I want to convert the following numeric array to cell array of cells having two elements each. Id like to convert this into a numeric array, and have all of the non numeric values be converted to nan. Strings have the string data type, while character vectors have the char data type.
Calculate with arrays that have more rows than fit in memory. Learn more about cell array, strings, floats, getting started. For example, to access the contents of the last cell of c, use curly braces. The num2cell function converts an array that has any data typeeven a nonnumeric type. For example if you ask matlab for lengthapple orange banana youll get 3, but if you want the length of each string in the array you can do. If your cell array contains numeric values, or even.
Extract vector of all numeric coefficients, including zeros, from symbolic polynomial. You should have just created a regular numerical double array in the first place. Given a numeric array a and a 1xk cell array of strings c, return a cell array b that is the same size as a and in which each element of b is the string in c indexed by the same element in a. Create symbolic polynomial from vector of coefficients. Numeric array to cell array of strings easy matlab cody. Mathworks is the leading developer of mathematical computing software for engineers and scientists. Generate a commaseparated list from a numeric array.
If the numbers are double or singleprecision floatingpoint numbers, then isstrprop rounds them to the nearest integer values before interpreting them as character codes. The actual problem is somewhat more complex its easy enough to solve this in the current case by just removing the variables from the table and concatenating them, then making a. Enclose indices in curly braces, to refer to the text, numbers, or other data within individual cells. Dec 17, 20 my guess is that your cell array is 2d but contains empty values so that when cell2mat attempts to take each cell row and create a numeric row, the empty disappears and the rows end up having different number of elements. My guess is that your cell array is 2d but contains empty values so that when cell2mat attempts to take each cell row and create a numeric row, the empty disappears and the rows end up having different number of elements. And, of course, if all the cell contents are the same size, and you just want to end up with a 2d array, then there was no need to create the cell array in the first place. A categorical array provides efficient storage and convenient manipulation of data, while also maintaining meaningful names for the values.
Learn more about convert, logical, double, cell array matlab. In order to mix characters and numeric values, a cell array must be used. Cell arrays commonly contain pieces of text, combinations of text and numbers from spreadsheets or text files, or numeric arrays of different sizes. Create symbolic variables, expressions, functions, matrices.
How do i convert strings stored in a cell array to numbers. This means that every entry in the cell must be a string, and in this case its not. C input cell array cell array input cell array, in which all cells contain the same data type. Content indexing with curly braces, access the contents of cellsthe numbers, text, or other data within the cellsby indexing with curly braces. If the input argument is a string array or cell array of character vectors, then str2double converts it to a numeric array having the same size. Concatenate cell with numeric array in tables matlab.
Because of your use of the verb extract for the name, it sounds to me as if you might not be aware that it is not possible to have an ordinary array that has a mix of characters and numeric values. For more information, see integer classes and floatingpoint numbers. The actual problem is somewhat more complex its easy enough to solve this in the current case by just removing the variables from the table and concatenating them, then making a new table. Is there a way to generate a commaseparated list from a numeric array without generating a temporary cell array.
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