plotting error bars in both x and y data

2020 8 10
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更新时间：2020 8 11
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Hi, i want to plot data set x vs y. Now i have different error values ​​in x and y. I want to plot error in both planes. The command error bar plots same error either horizontally, vertically or in both directions. But i want to plot different sets of errors in x and y. how can i do that. many thanks for your help.

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Star Strider
Star Strider 2020-8-10

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I am not certain what the problem is.
See: Control Error Bars Lengths in All Directions
.

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Sumera Yamin
Sumera Yamin 2020-8-10
lets suppose i have this simple set of data. this will plot me error bars either in horizontal or in vertical or in both, but with the same error in both directions. i want error bar in x and y according to err_x and err_y respectively. the error is plus-minus around the central value. I am not sure how can i control the length of error bars for this example.
x=[1:8];
y=[1:8];
err_x=[0.2,0.1,0.5,0.3,0.4,0.9,1.2,0.6];
err_y=[0.4,0.9,1.5,0.2,0.3,0.9,1.4,0.9];
plot(x,y)
hold on
errorbar(x,y,err_x,err_y)
Star Strider
Star Strider 2020-8-10
I would just do:
errorbar(x,y,err_y,err_y,err_x,err_x)
assuming that is the result you want.
Sumera Yamin
Sumera Yamin 2020-8-11
thankd for your comment. I noticed you took the error in y first and then the error in x. is this just to have the right direction in matlab?
Star Strider
Star Strider 2020-8-11
‘is this just to have the right direction in matlab?’
That is how the errorbar documentation says to order them. Please read the documentation section I linked to in my original Answer.

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