error when using stem()

I bought this product 2 days ago to do my homework. i tried doing the simplest stem function but i get an error no matter what i try..... why is stem bugged on my computer

x = 0:9;

y = sqrt(x);

figure(8);

stem(x,y,'m') % stem plot

axis([0 9 0 3])

set(gca,'FontSize',24)

set(gca,'XTick',0:9)

set(findobj(gcf,'LineWidth',0.5),'LineWidth',2)

saveas(8,'stem','png')

the error :

Error in Untitled2 (line 4)
stem(x,y,'m') % stem plot

[Star Strider]

Run the ver command in your Command Window.

Then click on Contact Us in the upper right corner of this page to ask a Technical Support question about your problem.

[the cyclist]

Your code works for me.

Is that that full text of the error message you get? If not, please post the full error message.

[tzela yaish]

it is the full text

[Image Analyst]

It is NOT. There is always an error message. It is never just a line number and the line of code. There is always an explanation.

[Steven Lord]

That's odd. Usually if a MathWorks function throws an error it will explain in more detail why it threw the error. Are you certain there's no other text displayed in red and/or orange when you ran that code?

[Walter Roberson]

What shows up when you command

which -all stem

Answer 1

[Image Analyst]

It worked fine for me. Here is the modern OOP way of programming it (you're using the old fashioned way):

x = 0 : 9;
y = sqrt(x);
hFig = figure;
stem(x, y, 'm', 'LineWidth', 2) % stem plot with line 2 pixels wide
grid on;
% Set up range for x and y axes.
xlim([0, 9]);
ylim([0, 3.5]);
xticks(0:9)
ax = gca;
ax.FontSize = 24 % Make axis labels big
% Thicken up the bounding box and grid lines.
ax.LineWidth = 4
% Save the figure as a PNG image.
fullFileName = fullfile(pwd, 'stem.png');
saveas(hFig, fullFileName)