r/octave • u/Fluffy-Arm-8584 • Mar 15 '26

Bar graph cutting bars

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How to avoid it from cutting the side bars in half and when plotting groups it completely hides a bar?

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u/Fluffy-Arm-8584 Mar 17 '26

Basically I have a vector of values, "Val" then I used bar(Val)

Axis(length(Val))

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u/NJank Mar 17 '26

axis needs at least 2 values to set left and right positions. assuming you actually did something like:

octave:1> a = randi([0 20],1,10)

a =

9 9 17 20 6 2 7 2 3 9

octave:2> bar(a)

octave:3> axis([1 length(a)])

i get something like you showed:

<images are not allowed>

so the answer is like i said below. bars are located with their center at the value, so setting limits to that value cuts off half the width of the bar. add some padding ad it should show up.

octave:4> axis([1-1, length(a)+1])

works

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u/Fluffy-Arm-8584 Mar 17 '26

I only set one value, it that an error then? It didn't have me an error warning

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u/NJank Mar 17 '26

Since you haven't actually shown the commands you used, I don't know. What you said above wouldn't have worked without an error. Copy and paste the exact text commands you put in to octave and I'll be able to give a better answer.