invalid filename saving figure

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Rose
Rose 2022-8-24
评论： Walter Roberson 2022-8-25
I am trying to save this figure using the following code, however I keep getting the error "invalid filename".
Str2 consists of a combination of text and values, to create a unique name, corresponding to the figure at hand. However, something, somewhere goes wrong. I have tried to remove the .png and add it to the saveas command. I have tried to name my figure, like f=figure(), but I cannot discover my error. Any solutions?
figure(2)
hold on
plot(output_time,Principal_stress_fatigue_fy_mx/10^6)
ylabel('equivalent stress [MPa]')
xlabel('time [s]')
grid
str2="Figure2"+ VTRIM + bank_angle + roll_rate + AC_mission_type(j)+".png"
saveas(gcf,str2)
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Walter Roberson
Walter Roberson 2022-8-25
Odd. You filled out R2021a as your release, but string() was supported for that parameter in R2021a. R2017a was the last release that did not support string() for that parameter.

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