how to plot graph using fplot command

syms x
y=exp(x)
fplot(y)

I got the following errpor. If I replace exp(x) by sin(x) then the code shows graph in the default range

[Dyuman Joshi]

What error?

The code seems to be working fine here and on my R2021a.

syms x
y = exp(x);
fplot(y)

Also, run this code and share the output you get.

which exp -all

[yogeshwari patel]

it is not working in 2023 a MATLAB VERSION

[Dyuman Joshi]

How is it not working?

If you get an error, share the full error mesage i.e all of the red text.

if something else, then specify in detail.

Answer 1

[Sulaymon Eshkabilov]

Alt syntax for using fplot is this one:

FUN = @(x)exp(x);
fplot(FUN), grid on

figure
% Or a bit better controlled way by specifying the range of x values
fplot(FUN, [-2, 2]) 
grid on

[yogeshwari patel]

I want to know the reason why fplo(y) is not working and we have to define it as f=@exp(x)

Answer 2

[Sulaymon Eshkabilov]

It is likely that you have saved one of your MATLAB files by fplot.m name or you have named/stored one of your variables by fplot.

(1) Run this command:

>> which fplot % See whether it is a MATLAB builtin function or variable or you saved M-file

If it is one of your saved M-files, just rename your M-file, e.g.: fplot_1.m

(2) Run this command:

>> clear all

(3) Now, you should be able to execute fplot() fcn.

All the best.