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

plot 2d

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.

Best Answer

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')
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