plot 3D grid using mesh() with lack of individual data

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Ying Wu 2021-10-7

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评论： Star Strider 2021-10-7

Hi, I want to use mesh to plot 3D grids with the format of mesh(x, y, z). My z is a 47*11 matrix, in which the 7 column actually has only 45 values, and I set the other 2 numbers as NaN in order to from a matrix with other columns. But when I plot the figure, the location of NaN is blank (see below).

Is there any method to fill these special locations? Thanks!

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Answer 1

Star Strider 2021-10-7

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It would be best to have your data, however an illustration of the procedure using the fillmissing function is — .

x = 1:11;

y = 1:47;

z = y(:)*x

z = 47×11

1 2 3 4 5 6 7 8 9 10 11 2 4 6 8 10 12 14 16 18 20 22 3 6 9 12 15 18 21 24 27 30 33 4 8 12 16 20 24 28 32 36 40 44 5 10 15 20 25 30 35 40 45 50 55 6 12 18 24 30 36 42 48 54 60 66 7 14 21 28 35 42 49 56 63 70 77 8 16 24 32 40 48 56 64 72 80 88 9 18 27 36 45 54 63 72 81 90 99 10 20 30 40 50 60 70 80 90 100 110

figure

mesh(x, y, z)

grid on

title('Original')

z(20:25,5:7) = NaN; % Create Gaps

figure

mesh(x, y, z)

grid on

title('With Gaps')

z = fillmissing(z, 'linear');

figure

mesh(x, y, z)

grid on

title('Interpolated')

.

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Ying Wu 2021-10-7

That's exactly what I want! Thank you soooo much~! I find the "linear" method is to replace the missing data with the average value of the two data points around it. That makes sense. Thanks again!