invalid use of operator

ro=10;

ri=30;

t=0:0.1:1500;

ci=0.5

c_L=(ci*ri)/ro.*(1-exp(1).^((-ro.*t/.((ri-ro).*t+1500))));

plot(t,c_L)

MATLAB said it is [Error: File: test.m Line: 5 Column: 37

Invalid use of operator.]

I was trying to express equation

What can I do?

Answer 1

[Alan Stevens]

c_L=(ci*ri)/ro.*(1-exp(1).^((-ro.*t/.((ri-ro).*t+1500)))); 

should be

c_L=(ci*ri)/ro.*(1-exp(1).^((-ro.*t./((ri-ro).*t+1500))));

| You have /. instead of ./

[Jong Hyun Lee]

ah..... what a silly mistake. Thank you!

[John D'Errico]

In fact, MATLAB TRIED to tell you exactly where the problem lies.

 c_L=(ci*ri)/ro.*(1-exp(1).^((-ro.*t/.((ri-ro).*t+1500)))); 
                                     ↑
Error: Invalid use of operator.

See that the red arrow points to the . in that line. It found something that made no sense. The error messages in MATLAB do try to be helpful where that is possible.

[Pratikansh]

THANK YOU SO MUCCHHH