Issues creating error bar for bar figure
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Hi,
I'm trying to create error bars on my bar plot.
I get the error: "Input arguments must be numeric, datetime, duration, or categorical."
I'm not sure what I'm doing wrong. Even when I make err equal to two numbers it still doesn't work.
AMean = 656631
BMean = 1130
ASTD = 237027
BSTD = 209
AHeight = 10
BHeight = 11
Names = ["A"; "B" ] ;
Averages = [AMean; BMean] ;
StandDev = [ASTD ; BSTD] ;
SampSize = [AHeight; BHeight] ;
NewTable = table(Names, Averages, StandDev, SampSize) ;
x = NewTable.Names ;
y = NewTable.Averages ;
err = StandDev ./ sqrt(SampSize) ;
bar(x, y)
errorbar(x,y,err)
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Matt J
le 11 Sep 2025
Modifié(e) : Matt J
le 11 Sep 2025
Here's an MWE:
x = ["A"; "B" ] ;
y = [3,4] ;
err = [0.5,0.75] ;
bar(x, y); hold on
errorbar(categorical(x),y,err,'r', 'Linestyle','none');
axis padded
4 commentaires
Chuguang Pan
le 11 Sep 2025
@Kristine. In order to remove a line connecting, you can use Linestyle = 'none' as shown in the code:
errorbar(categorical(x),y,err,'r', 'Linestyle','none');
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Chuguang Pan
le 11 Sep 2025
The problem lies in the variable Names is string array, which is not supported by errorbar function. You can use categorical function to convert string array to categries.
AMean = 656631;
BMean = 1130;
ASTD = 237027;
BSTD = 209;
AHeight = 10;
BHeight = 11;
Names = ["A"; "B" ] ;
Averages = [AMean; BMean] ;
StandDev = [ASTD ; BSTD] ;
SampSize = [AHeight; BHeight] ;
NewTable = table(Names, Averages, StandDev, SampSize) ;
x = NewTable.Names ;
y = NewTable.Averages ;
err = StandDev ./ sqrt(SampSize) ;
bar(x, y)
hold on
errorbar(categorical(x),y,err)
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