MATLAB: Function similar to isnan for zeros

isnanMATLAB

Is there a function that does what isnan does but with zeros?

Best Answer

 The ~ operator
    >> A=[1 0 2 3 0 0 4]
    A =
         1     0     2     3     0     0     4
    >> nonzeroMap=~A
    nonzeroMap =
         0     1     0     0     1     1     0

Related Solutions

MATLAB: Cannot get the same result in GA as I get in linprog

GA solver is stochastic in nature, there should be no reason to expect the same results as that of linprog. Infact you may not even get the same results for two successive runs of GA.

However there are ways to make the results closer by including a hybrid solver. Change the opts as follows:

opts = gaoptimset('StallGenLimit',500,'Generations',500,'TolFun',1e-1,'HybridFcn',@fmincon);

More info here:

http://www.mathworks.com/help/gads/gaoptimset.html

MATLAB: Using inputdlg and isnan

In your code, NOF never changes inside the loop. Therefore, if the loop enters, it won't ever exit because the exit condition will never be true. Make sure you are calling str2double within the loop:

res=inputdlg('Enter number of floors:');
nof=str2double(res);
while isempty(res) || isnan(nof)
    %  ^ user canceled   ^ input was not numeric
    disp('error')
    res=inputdlg('Enter number of floors:');
    nof=str2double(res);
end

If you want to let the user use the command line:

opts.WindowStyle = 'normal';
res=inputdlg('Enter number of floors:', '', 1, {''}, opts);
nof=str2double(res);
while isempty(res) || isnan(nof)
    disp('error')
    res=inputdlg('Enter number of floors:', '', 1, {''}, opts);
    nof=str2double(res);
end

Best Answer

Related Solutions

MATLAB: Cannot get the same result in GA as I get in linprog

MATLAB: Using inputdlg and isnan

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