How can I add error bars on a scatter plot using the calculated errors?

I want to add error bars to this graph: (SEM is the standard error mean for Dt, and I want to add error bars only onto Dt in the graph)

dfs= [  0    4.5000    9.0000   13.5000   18.0000   22.5000   27.0000   31.5000]
Dt= [  4.1681    4.1719    3.8631    4.1915    3.2843    3.2850    3.2308    3.2795]
R= [ 6.2272    7.4491    8.4765    7.7533    9.3598   12.9844   13.9740    9.2937] 

f(1)=figure; plot (dfs.',Dt,'ro',dfs.',R,'bo');

SEM = [ 0.0142    0.0142    0.0127    0.0164    0.0183    0.0224    0.0193    0.0232];

Thanks!

Answer 1

[Star Strider]

The SEM values are sufficiently small that they appear as small horizontal bars. This plots both of your data series, with the error bars only plotted for Dt:

figure(1)
errorbar(dfs, Dt, SEM, 'ro')
hold on
plot(dfs,R,'bo')
hold off