Is there a way to generate a commaseparated list from a numeric array without generating a temporary cell array. 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. Numeric array to cell array of strings easy matlab. Id like to convert this into a numeric array, and have all of the nonnumeric values be converted to nan.
Content indexing with curly braces, access the contents of cellsthe numbers, text, or other data within the cellsby indexing with curly braces. If you include elements of unlike classes in a matrix, matlab converts some elements so that all. Cell arrays commonly contain either lists of text, combinations of text and numbers, or numeric arrays of different sizes. 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. You may assume that every element of a is an integer on the interval 1,k. If your cell array contains numeric values, or even. Input array, specified as a numeric array, logical array, categorical array, datetime array, duration array, string array, or cell array of character vectors. Cell arrays commonly contain either lists of character vectors of different lengths, or mixes of strings and numbers, or numeric arrays of different sizes. These categories can have a natural order, but it is not required. Convert this matrix to a cell array by using sym2cell. 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. 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. Learn more about cell array, strings, floats, getting started. Calculate with arrays that have more rows than fit in memory.
Create symbolic variables, expressions, functions, matrices. Convert cell array with numeric and nonnumeric data into a. 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. Create a 1by11 cell array of character vectors containing state names from new england. In matlab, it is not possible to have a single numeric array that also stores strings.
Input array, specified as a numeric array, a character array, a cell array of character arrays, a categorical array, or a string array. Numeric array to cell array of strings easy matlab cody. Concatenate cell with numeric array in tables matlab. Determine whether input is numeric array matlab isnumeric.
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. Mathworks is the leading developer of mathematical computing software for. How can i convert a cell array into a numeric array in matlab. Convert logical values into numeric values matlab answers. T cell2tablec converts the contents of an mbyn cell array, c, to an mbyn table, t. The size of the resulting cell array corresponds to the size of the input matrix. Learn more about convert, logical, double, cell array matlab.
A cell array is a data type with indexed data containers called cells, where each cell can contain any type of data. Convert a matrix of symbolic variables and numbers to a cell array. Create categorical array from cell array of character vectors. A cell array is a data type with indexed data containers called cells. 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. Tf isnumerica returns logical 1 true if a is an array of numeric data type. Learn more about cell2mat, cell conversion, cell arrays matlab. You should have just created a regular numerical double array in the first place. This data should be numeric, but it sporadically has non numeric e.
Mathworks is the leading developer of mathematical computing software for engineers and. 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. I have found the index from each individual table in the cell array. 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. Input a of class cell and input b of class char must be cell arrays of strings, unless one is a string. Mathworks is the leading developer of mathematical computing software for engineers and scientists. Convert cell array with numeric and nonnumeric data into. 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. I have a cell array of data pulled from field measurements. 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.
There seems to be no way of telling matlab that i want it to convert as variable to a cell array. 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. Extract vector of all numeric coefficients, including zeros, from symbolic polynomial. If not, would you find this functionality useful if it was added to matlab.
Refer to sets of cells by enclosing indices in smooth parentheses. There are two ways to refer to the elements of a cell array. Learn more about cell2mat cell excel, cellfun matlab. Each cell contains an element of the symbolic matrix s. Using cell array to find corresponding values of a numeric. This example shows how to convert a variable in a table from a cell array of character vectors to a categorical array. 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. Generate a commaseparated list from a numeric array. Convert symbolic array to cell array matlab sym2cell. 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. Input array, specified as a string array, character array, cell array of character vectors, or numeric array. Strings have the string data type, while character vectors have the char data type. Cody is a matlab problemsolving game that challenges you to expand your knowledge. Cell to number array matlab answers matlab central.
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. Each column of c provides data for a table variable. If the numbers are double or singleprecision floatingpoint numbers, then isstrprop rounds them to the nearest integer values before interpreting them as character codes. This example shows how to create a categorical array. Convert cell array to ordinary array of the underlying. 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.
If the input array has no name, then cell2table creates variable names of the form var1. Array that contains values assigned to categories matlab. How do i convert strings stored in a cell array to numbers. Oct 30, 2019 there seems to be no way of telling matlab that i want it to convert as variable to a cell array. Enclose indices in smooth parentheses, to refer to sets of cellsfor example, to define a subset of the array. 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. Convert symbolic values to matlab double precision. A categorical array provides efficient storage and convenient manipulation of data, while also maintaining meaningful names for the values. In order to mix characters and numeric values, a cell array must be used. Enclose indices in curly braces, to refer to the text, numbers, or other data within individual cells. This means that every entry in the cell must be a string, and in this case its not. Id like to convert this into a numeric array, and have all of the non numeric values be converted to nan.
So if there is some good way to automate this process since the actual data is large enough to manually handle it. For example, to access the contents of the last cell of c, use curly braces. 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. Input cell array, in which all cells contain the same data type. 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. Cell arrays commonly contain pieces of text, combinations of text and numbers from spreadsheets or text files, or numeric arrays of different sizes.
312 651 1515 349 1489 906 1557 947 230 75 180 1256 505 343 530 757 481 323 821 474 224 898 1313 1203 242 1053 440 1189