Using If statement with data from excel

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rammah nagi 2019-7-26

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https://ww2.mathworks.cn/matlabcentral/answers/473665-using-if-statement-with-data-from-excel

评论： Star Strider 2019-7-26

Hi, I would like to write an if statement where if RTcout<Ta , RTcout=Ta. The difficulty im having is that Ta has not been defined in the script but has been subbed into equations. Below is an example of the code:

Tcout1 = (subs(Tcout,{J,Ta,Vw},{numData1(2:25,6)',numData1(2:25,8)',numData1(2:25,12)'}));
RTcout = real(Tcout1);

Any help would be appreciated.

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Star Strider 2019-7-26

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https://ww2.mathworks.cn/matlabcentral/answers/473665-using-if-statement-with-data-from-excel#answer_385022

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Do the threshold operation before you do the substitution:

numData = randi(500, 1, 10);                                        % Original Data
JData = numData;                                                    % Create New Data Vector
JData(Jdata < 200) = 0;                                             % Threshold Or Substitute Data
syms a b J 
v = a*b + J;
vnew = subs(v, {J,a,b},{numData', randi(9,1,10)',randi(9,1,10)'})   % Substitute Thresholded Data