What are possible issues if MATLAB doesn't recognise a variable?

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beginner94 2019-1-29

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https://ww2.mathworks.cn/matlabcentral/answers/442060-what-are-possible-issues-if-matlab-doesn-t-recognise-a-variable

评论： beginner94 2019-1-29

if strcmp(str(1:3), 'Min') == 1
    VZ = 1;    
end
if strcmp(str(1:3), 'Max') == 1
    VZ = -1;
end
VZ
[k l s] = evIII_weibull('param', mevI, sevI, x0, VZ);
VZ

Good afternoon,

the first time I call "VZ" MATLAB gives me the correct value, but after giving it as input for another function MATLAB doens't know the value anymore. Does anyone know how this is possible? Furthermore the function "evIII_weibull" doesn't accept VZ as input (eventhough I have declared it as input in evIII_weibull.m

This is the error message I get:

??? Input argument "VZ" is undefined.

Please help