convertting equation to matlab /octave

Question

I have an equation I tried converting to matlab/octave but keep getting a mapping function error. Can some tell me what I'm doing wrong. The equation is below.

Thanks

The matlab/octave code below is

fs=44100; %sampling frequency
t=(0:10*fs)/fs; %Time vector
alpha=1.1513;
siga1=cosh*(400*pi*j*(cosh*(alpha*t)-sinh*(alpha*t))/alpha);
siga2=sinh*(400*pi*j*(cosh*(alpha*t)-sinh*(alpha*t))/alpha);
sigb=siga1-siga2;

Answer 1

The hyperbolic sine and cosine are functions and you are treating them as variables.

This should work (as long as you have j defined somewhere)

fs=44100; %sampling frequency
t=(0:10*fs)/fs; %Time vector
alpha=1.1513;
siga1=cosh(400*pi*j*(cosh(alpha*t)-sinh(alpha*t))/alpha);
siga2=sinh(400*pi*j*(cosh(alpha*t)-sinh(alpha*t))/alpha);
sigb=siga1-siga2;

Answer 2

I have not worked on MATLAB for 2 years,but i believe your functions must be like this :

siga1=cosh(400*pi*j*(cosh*(alpha*t)-sinh(alpha*t))/alpha); 
siga2=sinh(400*pi*j*(cosh*(alpha*t)-sinh(alpha*t))/alpha);

Can you give me a feedback after you try it ?