Error with plotting my function

Having issues getting my nonlinear function to plot.

f = @(x) 2.^x-5*x+2;            %Given Function
xaxis = [0:0.5:2];              %x-axis
plot(xaxis,f)                   %plotting function //DOESN'T WORK

[Jan]

"Doesn't work" does not explain the problem. You get an error message:

Error using plot
Invalid data argument. 

This is an important hint. The 2nd input is a function handle, but Matlab expect numerical values.

For a solution see Star Strider's answer.

[Ethan Bales]

yeah sorry about that. This is my first time using a forum like this and I'm still relatively new to coding. Thanks for insight!

Answer 1

[Star Strider]

It works if you give ‘f’ a vector to work with —

f = @(x) 2.^x-5*x+2;            %Given Function
xaxis = [0:0.5:2];              %x-axis
plot(xaxis,f(xaxis))            %plotting function //DOESN'T WORK —> YEs, IT DOES!

Experiment to get different results.

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[Ethan Bales]

ahhhh I see the issue now, thanks for help!!

[Star Strider]

My pleasure!

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