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read files and check if something is number

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i try to read files line by line
the files are like that : Strength: 438439
B: 489893
C: nothing
D: 832
i want to read the file and as a result i'd like to have Strength=438439 etc. and if i find something that is not a number (like the variable C) an error must appear
how do i check this?

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Accepted Answer

Mathieu NOE
Mathieu NOE on 13 Jan 2021
hello see the different options in code below
my prefered one is the second
a=readcell('test.txt',"Delimiter",":");
% % option 1 : create a structure :
% for ci = 1:size(a,1)
% Varnames{ci} = matlab.lang.makeValidName(a{ci,1});
% myStruct.(Varnames{ci}) = a{ci,2};
% end
% option 2 using assignin (in function variableCreator) :
for ci = 1:size(a,1)
% change blanks in variable names to underscore (otherwise
% variableCreator will throw an error mesage
str = strrep(a{ci,1}, ' ', '_');
val = a{ci,2};
if ischar(val)
disp(['error : non numeric data in line : ' int2str(ci)]);
val = NaN;
end
variableCreator ( str, val )
end
clear str val a ci
% option 3 creating a table - one line engine !
% T = array2table(a)
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
function variableCreator ( newVar, variable )
assignin ( 'caller', newVar, variable );
end

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