# Difference between errorbar and errorbarxy (function)

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Nik Rocky on 5 Jul 2020
Commented: Nik Rocky on 6 Jul 2020
Hello,
I'm calculating and plotting a mean-Values and standard deviation:
If I plot it via errorbar, I get:
....
errorbar(M1(:,2),M1(:,1),S1(:,2),S1(:,1),'-o','both','LineWidth',1.5,'MarkerFaceColor','cyan','MarkerSize',10,'MarkerEdgeColor','black','DisplayName',label1{1})
....
errorbar(M2(:,2),M2(:,1),S2(:,2),S2(:,1),'-s','both','LineWidth',1.5,'MarkerFaceColor','yellow','MarkerSize',10,'MarkerEdgeColor','black','DisplayName',label2{1})
...
If I plot with errorbarxy function, I get:
errorbarxy(M1(:,2),M1(:,1),S1(:,2),S1(:,1))
....
errorbarxy(M1(:,2),M1(:,1),S1(:,2),S1(:,1))
....
Why, I'm getting different line length? I tnink an errorplot has a wrong length, because there are each one value for x-axis and y-axis?! What is the better way to plot main + std?
values are:
M1 =
0.0570 0.9098
0.0860 0.8615
0.7741 0.1542
0.9682 0.0200
0.9874 0.0016
M2 =
0.0591 0.9049
0.2164 0.7222
0.7954 0.1332
0.9703 0.0091
0.9761 0.0082
S1 =
0.0196 0.0220
0.0356 0.0585
0.0349 0.0636
0.0354 0.0347
0.0027 0.0027
S2 =
0.0323 0.0461
0.2140 0.2619
0.2021 0.1885
0.0216 0.0158
0.0171 0.0141

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Nik Rocky on 6 Jul 2020
Sorry, I dont understand, did you mean - basic function has allready x-y errorbar plot? What is the syntaxis? Thanks!
dpb on 6 Jul 2020
>> which -all errorbar
C:\ML_R2019b\toolbox\matlab\specgraph\errorbar.m
errorbar is a built-in method % tall method
>> which -all errorbarxy
>>
errorbarxy is NOT a TMW-supplied function but there is one for the job; my recommendation is to use it.
The FEX submission may be just perfectly fine, but why throw confusion between two functions that may have chosen different input arrangements into the mix besides?
Nik Rocky on 6 Jul 2020
Sorry, it was to late and my brain was down.
I have a solution with standard errobar:
errorbar(M2(:,2),M2(:,1),S2(:,2),S2(:,2),S2(:,1),S2(:,1),'-s','LineWidth',1.5,'MarkerFaceColor','yellow','MarkerSize',10,'MarkerEdgeColor','black','DisplayName',label2{1})
I have to define xpos and xneg, ypos and yneg
So just scribe the same two times =)

the cyclist on 6 Jul 2020
See this example from the documentation for errorbar.

#### 1 Comment

Nik Rocky on 6 Jul 2020
Yes, thank you! I solve it by writing two time a values for xpos and xneg, ypos and yneg =)