How can I plot acquired matrix data

Question

Sam Hurrell 2020-11-12

0
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https://ww2.mathworks.cn/matlabcentral/answers/645973-how-can-i-plot-acquired-matrix-data

回答： KSSV 2020-11-12

I have multiple data sets as matrix's: (x,y,C),(x,z,C), or (y,z,C). They are all 2D data slices exported from comsol, with coloumns 1-2 as the axis (x/y/z) and the 3rd column as the output value 'C'. The maximum axis value is x=0.1, y=0.2, z=0.5, and the min values are all 0. Values usually have up to 16 decimal places but should be rounded to 3dp. I want to present each matrix as either a pcolor 2D map or a surf plot, with the result being C. A typical matrix would look like this:

X Y C

0.04 0.069608 0.082662

0.043 0.074804 0.115348

0.045 0.074804 0.119363

0.048 0.076536 0.134744

(but the largest dataset is ~135,000 rows)