Why are the colours in the legend different?

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Em
Em on 28 Aug 2022
Answered: Cris LaPierre on 28 Aug 2022
Can anyone see why my legend might not be appearing correctly?
plot(powerpc,SR09depth100mms,'-o','color',[1 .78 .1],'LineWidth',1)
xlabel('Power/mW')
ylabel('Trench Depth/\mum')
title('100mms^-^1 scan rate tracks')
hold on
plot(powerpc,SR08depth100mms,'-o','color',c(25,:),'LineWidth',1)
hold on
plot(powerpc,SR07depth100mms,'-o','color',c(45,:),'LineWidth',1)
hold on
plot(powerpc,SR06depth100mms,'-o','color',c(65,:),'LineWidth',1)
hold on
plot(powerpc,SR05depth100mms,'-o','color',c(75,:),'LineWidth',1)
hold on
plot(powerpc,SR04depth100mms,'-o','color',c(85,:),'LineWidth',1)
hold on
%plot(powerpc,SR03depth100mms,'-o','color',[.1 .4 .1],'LineWidth',1)
%plot(powerpc,SR03depth100mms,'-o','color','magenta','LineWidth',1)
plot(powerpc,SR03depth100mms,'-o','color',[.7 .4 .5],'LineWidth',1)
hold on
plot(powerpc,SR02depth100mms,'-o','color','k','LineWidth',1)
%legend({'DC=0.9@100mm/s','DC=0.8@100mm/s','DC=0.7@100mm/s','DC=0.6@100mm/s','DC=0.5@100mm/s','DC=0.4@100mm/s','DC=0.3@100mm/s','DC=0.2@100mm/s'},'Location','northwest','Orientation','vertical')
ylim([0 6])
legend({'DC=0.9','DC=0.8','DC=0.7','DC=0.6','DC=0.5','DC=0.4','DC=0.3','DC=0.2'},'Location','northwest','Orientation','vertical')
  3 Comments
dpb
dpb on 28 Aug 2022
Well, we don't have any data so no idea what the colormap(?) variable c is nor the data itself to try to compare to, so very little (as in not a thing) we can say specifically other than you have eight (8) calls to plot() but only seven(7) lines are visible -- that could be one is off scale entirely or NaN so isn't rendered or...
The legend lines that do show appear to match the colors as would expect; what do you think isn't as expected?

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Answers (1)

Cris LaPierre
Cris LaPierre on 28 Aug 2022
Legend is consistent with your code. Why do you think it is wrong?
Here's an attempt at recreating your plot. Note that I elected to make the values for 0.4 NaN. They could also be the same values as 0.9.
powerpc = [27 42 56 70];
SR09depth100mms = [1.3 4 4.1 4.8];
SR08depth100mms = [1.6 1.9 3.7 3.8];
SR07depth100mms = [0.9 1.5 2.1 3];
SR06depth100mms = [0.8 1.95 1.75 3.2];
SR05depth100mms = [0.3 1 1.2 1.8];
SR04depth100mms = [nan nan nan nan];
SR03depth100mms = [0.4 1.3 2.3 1.95];
SR02depth100mms = [0 0 0.1 0.5];
c = parula(100);
plot(powerpc,SR09depth100mms,'-o','color',[1 .78 .1],'LineWidth',1)
xlabel('Power/mW')
ylabel('Trench Depth/\mum')
title('100mms^-^1 scan rate tracks')
hold on
plot(powerpc,SR08depth100mms,'-o','color',c(25,:),'LineWidth',1)
hold on
plot(powerpc,SR07depth100mms,'-o','color',c(45,:),'LineWidth',1)
hold on
plot(powerpc,SR06depth100mms,'-o','color',c(65,:),'LineWidth',1)
hold on
plot(powerpc,SR05depth100mms,'-o','color',c(75,:),'LineWidth',1)
hold on
plot(powerpc,SR04depth100mms,'-o','color',c(85,:),'LineWidth',1)
hold on
%plot(powerpc,SR03depth100mms,'-o','color',[.1 .4 .1],'LineWidth',1)
%plot(powerpc,SR03depth100mms,'-o','color','magenta','LineWidth',1)
plot(powerpc,SR03depth100mms,'-o','color',[.7 .4 .5],'LineWidth',1)
hold on
plot(powerpc,SR02depth100mms,'-o','color','k','LineWidth',1)
%legend({'DC=0.9@100mm/s','DC=0.8@100mm/s','DC=0.7@100mm/s','DC=0.6@100mm/s','DC=0.5@100mm/s','DC=0.4@100mm/s','DC=0.3@100mm/s','DC=0.2@100mm/s'},'Location','northwest','Orientation','vertical')
ylim([0 6])
legend({'DC=0.9','DC=0.8','DC=0.7','DC=0.6','DC=0.5','DC=0.4','DC=0.3','DC=0.2'},'Location','northwest','Orientation','vertical')
hold off % Added this so the plot is repeatable run to trun

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