Not enough input arguments when using bar()

Hi,

I am trying to generate a bar graph specifically 'Specify Bar Locations as String Vector' from the documentation.

x = ["Outdoor1" "Outdoor2" "Outdoor3" "Outdoor4"];

y = [540   524   515   424];

>> bar(x,y)
Error using bar
Not enough input arguments.

I am not able to figure out why am I getting the above error when the example mentioned in the documentation is pretty much the same but seems to be working.

[Mario Malic]

Maybe you have a function called bar in your current folder?

which bar

/MATLAB/toolbox/matlab/specgraph/bar.m

[Raghav Rathi]

/usr/local/MATLAB/R2023a/toolbox/matlab/specgraph/bar.m

There is no other function named bar in the PWD

Answer 1

[Star Strider]

Use the categorical function —

x = categorical(["Outdoor1" "Outdoor2" "Outdoor3" "Outdoor4"]);

y = [540   524   515   424];

figure
bar(x,y)

Another option is to use numerical values, for example 1:4 and then use ‘x’ as tick labels —

x = 1:4;
xl = ["Outdoor1" "Outdoor2" "Outdoor3" "Outdoor4"];
y = [540   524   515   424];

figure
bar(x,y)
set(gca,'XTickLabel',xl)

It all depends on what you want to do.

.

[Raghav Rathi]

Thanks for the help.

[Star Strider]

As always, my pleasure!

Answer 2

[Dyuman Joshi]

It works fine here - R2023b but does not on my MATLAB app - R2021a.

Since you have R2023a, it means that the support for string array as input to bar must have been implemented in R2023b.

Workaround > Convert x to a categorical array and then plot -

x = ["Outdoor1" "Outdoor2" "Outdoor3" "Outdoor4"];
x = categorical(x);
y = [540   524   515   424];

bar(x,y)

[Raghav Rathi]

Its wotking now, Thanks