What causes an "Argument to dynamic structure reference must evaluate to a valid field name" error please? code attached.

This is my code. I have matlab error saying "Argument to dynamic structure reference must evaluate to a valid field name. Can anyone see a problem please?

freq=-10:0.01:10;
FT2=(1./(2*pi*freq))*(sin.(2*pi*freq))+(1i*cos(2*pi*freq-1.));

Thank you =)

Answer 1

[David Young]

The dot after sin makes it look like a structure rather than a function call. Omit the dot.

[rocio romero]

Thank you