MATLAB: How to delete the weird flat line

graphingMATLABweird lineyolosolo322

How do I delete the flat green line that appears? It seems to just pop in for no reason.

Current= xlsread(path,sheet,['B2:B' num2str(unique+1)]);
PeakPower= xlsread(path,sheet,['E2:E' num2str(unique+1)]);
Slope=PeakPower/Current;
figure(SlopevsA) 
plot(Current,Slope)    
hold on

That is my code

Best Answer

If your variables Current and PeakPower are column vectors (which appears to be the case), when you divide them

Slope=PeakPower/Current;

the output, Slope is a matrix and at least one column of that matrix are zeros which produces the straight line at y=0.

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If you do "Print to Figure", you'll get a copy you can edit any way you like, including deleting the markers.

MATLAB: How to make the second graph look like the first

yyaxis automatically changes the linestyle and even inserts markers when plotting multiple lines. If you want to make the second plot appear as the first one, then I suggest you use yyaxis but hide one of the axes.

yyaxis left
plot(rand(10,10))
yyaxis right
set(gca,'ycolor','none')

You could also grab the default settings of the yyaxis in your first graph

cs=get(gca,'colororder');
ls=get(gca,'linestyleorder')

ans =

7×2 char array
    '- '
    '--'
    ': '
    '-.'
    'o-'
    '^-'
    '*-'

and then simply apply them after toggling to your second graph

set(gca,'linestyleorder',ls)
set(gca,'colororder',cs)

Note that the yyaxis by default only has one colororder and multiple linestyleorders, whereas the normal plot has one linestyleorder and multiple colororders. By default, the first linestyle is plotted with each color, then the second linestyle is plotted with each colors and so on... This behaviour is controlled by the colororderindex and linestyleindex.

Best Answer

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