Matlab Error "X, Y, Z, and C cannot be complex"

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Hi all,
I am trying to plot a surface however, I get an error "X, Y, Z, and C cannot be complex." which means, apparently there are some xomplex values. However, I put the command to get only the real values and I get a blank graph with no points at all (it is obvious that there are solutions with real values). Couod you help me with that? here is the code
a=0.1735;
b=0.19;
c=0.3283;
d=-0.017;
[I,I_opt] = meshgrid(0.1:0.1:4.67,0.1:0.1:4.67);
Z=exp(0.3524*(I-I_opt))*a*exp(b*I)*(1-a*exp(b*I))/(c*I_opt^d*(1-c*I_opt^d));
redChannel=Z<1;
colors = double(redChannel);
surf(I,I_opt,real(Z),colors)
zlim([0 10])

Risposta accettata

Walter Roberson
Walter Roberson il 15 Lug 2020
>> Z=exp(0.3524.*(I-I_opt)).*a.*exp(b.*I).*(1-a.*exp(b.*I))./(c.*I_opt.^d.*(1-c.*I_opt.^d));

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