Plotting 2D Sensor data with the same value on X-axis

Hi, I got the series of variable measurement from many points. So that, in one point of x-axis, there will be more more values existed. Below is the data example A B C -78 -77 -91 -77 -77 -90 -75 -77 -91 -78 -77 -92 -77 -77 -91 -76 -77 -91 -78 -77 -90 -78 -77 -91 -78 -77 -90 -76 -77 -88 -79 -77 -89 -77 -77 -92 -77 -77 -92 -77 -77 -90 -78 -77 -91 -78 -77 -92 -77 -77 -96 -77 -77 -94 -78 -77 -96 -78 -77 -92 -78 -77 -92 -79 -77 -91 -79 -77 -92 -79 -77 -89 -80 -77 -90 -79 -77 -88 -78 -77 -95 -77 -77 -92 -77 -77 -90 -79 -77 -91 -77 -77 -88 -78 -77 -90 -78 -77 -90 -78 -77 -96 -79 -77 -90 -77 -77 -87

I want to plot all the data with three categories A,B, and C. I start to try with plot (x,y), but I have no x in this date, except the categories.

Answer 1

[Star Strider]

I am not certain what you want.

Try this:

C = { 'A'  'B'  'C'};
V = [-78 -77 -91
    -77  -77  -90
    -75  -77  -91
    -78  -77  -92
    -77  -77  -91
    -76  -77  -91
    -78  -77  -90
    -78  -77  -91
    -78  -77  -90
    -76  -77  -88
    -79  -77  -89
    -77  -77  -92
    -77  -77  -92
    -77  -77  -90
    -78  -77  -91
    -78  -77  -92
    -77  -77  -96
    -77  -77  -94
    -78  -77  -96
    -78  -77  -92
    -78  -77  -92
    -79  -77  -91
    -79  -77  -92
    -79  -77  -89
    -80  -77  -90
    -79  -77  -88
    -78  -77  -95
    -77  -77  -92
    -77  -77  -90
    -79  -77  -91
    -77  -77  -88
    -78  -77  -90
    -78  -77  -90
    -78  -77  -96
    -79  -77  -90
    -77  -77  -87];

figure(1)
plot((1:size(V,1)), V)
legend(C, 'Location','W')

[Albert Sagala]

Thank you for your response. You plot the data on Matrix V horizontally. In my case I want the data for each points (A,B,C and D) to be plot vertically. I want to see the data spread for each point vertically (Attached is the figure)

[Star Strider]

That’s a new requirement.

Try this:

figure(1)
plot((1:size(C,2)), V, 'pr')
axis([0  4    ylim+[-1 1]])
set(gca, 'XTick',[1:3], 'XTickLabel',C)

figure(2)
plot((1:size(C,2)), V, 'pr')
axis([0,  4,    (min(ylim)-1),  -60])
set(gca, 'XTick',[1:3], 'XTickLabel',C)
text([1:3], -65*[1 1 1], C)

Experiment to get the result you want.

[Albert Sagala]

Hi Star, Thank you for your help. It works.

[Star Strider]

My pleasure.

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