"real positive integers or logicals" error

A = 942;

f0 = 19;

w0_1 = 38*pi;

Q_1 = -0.9426;

Q_2 = -0.1678;

t = 0:0.1:5;

cosfn1 = A*cos(2*pi*f0*t + Q_1);

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For a cod segment above, I get an error as "Subscript indices must either be real positive integers or logicals." And this points tthe cosfn1. Why do I get such an error? Thanks for your help

Answer 1

[Jonathan Sullivan]

do you have a variable named cos?

whos cos

If you do, you will want to clear it out.

clear cos

[Sean de Wolski]

+1.

Sefa, copying and pasting your code above works with no variables named cos()

Answer 2

[sefa]

Thanks for your answer