# How to determine if a cell has numeric data?

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Zachary Reyes on 25 Oct 2018
Commented: Lucas Junginger on 24 Apr 2022
How would I go about making a function that determines if a cell contains numeric data? It is a single cell, not a cell array. I am trying to determine if the data is numeric and the dimensions of the numeric array. If the data is not numeric, the dimensions are an empty set. Here is what I have so far:
function [isNum, dim] = isCellNumeric(c)
if (isnumeric(c))
isNum = true;
dim = size(c);
else
isNum = false;
dim = {};
end
end
Any help is appreciated, thanks!
##### 2 CommentsShowHide 1 older comment
Zachary Reyes on 25 Oct 2018
The empty matrix makes sense; I will fix the code to look at the contents, thanks a lot.

OCDER on 25 Oct 2018
% checkCellForNum will look at each element of a cell array to look for numeric
% elements. Returns a logical array of 1 for numeric positions and a cell array
% of dimensions for only the numeric cell elements.
%
% EXAMPLE
% C = {[1 3] 2 'b' 'c'};
% [IsNum, Dim] = checkCellForNum(C)
function [IsNum, Dim] = checkCellForNum(C)
IsNum = cellfun('isclass', C, 'double'); %Only checks for double. If you want the same output as isnumeric, use cellfun(@isnumeric, C)
Dim = cell(size(C));
Dim(IsNum) = cellfun(@size, C(IsNum), 'un', 0);
Lucas Junginger on 24 Apr 2022
That did it for me!

Giovanni Liverani on 22 Nov 2019
The way is solved it is:
waitfor(msgbox('You are about to participate in a "... Task". Before we continue, you will be asked to insert your personal details (student ID, gender, age) below.'));
prompt = {'Enter Student ID:','Gender (1: Male, 0:Female):', 'Age'};
dlgtitle = 'Input';
dimension = [1 45];
definput = {'123456789','1','21'};
SubjectData = inputdlg(prompt,dlgtitle,dimension,definput);
waitfor(SubjectData);
if isnan(str2double(SubjectData{1})) == 1 || isnan(str2double(SubjectData{2})) == 1|| isnan(str2double(SubjectData{3})) == 1
waitfor(errordlg('Invalid Value. Call assistant to restart the experiment', 'Error'));
return
end

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