plot a cube root function

My Script code is as follows:

clear all; close all;

figure;

fplot(@(x) ((2*x+5)^(1/3)),[2 3], 'LineStyle', '-', 'Color', 'b', 'LineWidth', 1);

ti=title('g(x) = (2x+5)^1^/^3');

set([ti,gca],'fontsize',10);

The error message is:

Warning: Function fails on array inputs. Use element-wise operators to increase speed.

> In matlab.graphics.function.FunctionLine>getFunction

In matlab.graphics.function.FunctionLine/set.Function_I

In matlab.graphics.function.FunctionLine/set.Function

In matlab.graphics.function.FunctionLine

In fplot>singleFplot (line 223)

In fplot>@(f)singleFplot(cax,{f},limits,extraOpts,args) (line 182)

In fplot>vectorizeFplot (line 182)

In fplot (line 153)

In Assignment2Question1aii (line 3)

How can I fix this?

Answer 1

[KSSV]

Use this line:

fplot(@(x) ((2*x+5).^(1/3)),[2 3], 'LineStyle', '-', 'Color', 'b', 'LineWidth', 1);

as a function. Read about matlab element by element operations.

[Katie Shearer]

The code is no longer receiving an error message.

However, this gives me a blank graph output.

[KSSV]

I am getting a plot in 2017b. What version you are using?

[Katie Shearer]

I have been working in 2016a.

I am currently downloading 2018 but it is taking a while, I'll see if that fixes it.