## Integrating function of t over numerical values

Asked by Ragini Ravichandren

### Ragini Ravichandren (view profile)

on 21 Oct 2019
Latest activity Edited by Ragini Ravichandren

### Ragini Ravichandren (view profile)

on 21 Oct 2019
Accepted Answer by Bjorn Gustavsson

### Bjorn Gustavsson (view profile)

Has anyone ever experienced the following errors when attempting to integrate a function handle with respect to a certain variable? I followed the commands used to calculate an integral, and found myself with the following problems. Any advice would be greatly appreciated!

### Bjorn Gustavsson (view profile)

Answer by Bjorn Gustavsson

### Bjorn Gustavsson (view profile)

on 21 Oct 2019

Yes, that means that the function you call integral with is called with an array of values - therefore your function (the long expression) should manage that. The way you've written it you will, implicitly, call it with arrays for t - so you'll have to replace ^ (which is the matrix-power in matlab) to .^ (which is the elementwise power), and where you have t*cos(t) (or the like) you'll also have to change from matrix-multiplication (*) to element-wise multiplication (.*).
HTH

#### 1 Comment

Ragini Ravichandren

### Ragini Ravichandren (view profile)

on 21 Oct 2019

Got it, thanks! I was wondering, however, I also wanted to use the solve(eqn, Y) function, in order to set the equation equal to s and solving for g. Will changing the equation to element wise also allow use of the solve function?

### Andrei Bobrov (view profile)

Answer by Andrei Bobrov

### Andrei Bobrov (view profile)

on 21 Oct 2019

F = str2func(vectorize(FUN));
Q = integral(F,0,6);