2D Line Interpolation

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Muhammad Zafar Iqbal
评论： Muhammad Zafar Iqbal 2020-6-6
Hi
I have data in 2D as a line data (example given as)
y1 x1 y2 x2 val err
36.97 126.5 36.79 126.45 394.94 1.79
36.98 126.4 36.79 126.45 179.59 0.75
37 126.65 36.55 126.64 82.64 0.35
37.4 127.21 37.35 126.7 379.76 1.53
34.75 127.17 34.4 126.7 172.95 0.73
37.45 126.82 37.89 126.77 401.29 1.6
36.98 126.4 37.08 126.77 1168.43 4.97
37.4 127.21 37.89 126.77 114.6 0.52
35.32 127.45 34.98 126.9 289.95 1.19
36.97 126.5 37.49 126.92 3462.07 15.01
37.16 127.52 37.49 126.92 151.54 0.61
37.4 127.21 37.49 126.92 167.04 0.69
37.16 127.52 37.49 126.92 240.72 1.01
36.2 127.48 36.27 126.92 235.94 0.95
36.35 127.2 36.27 126.92 155.95 0.63
35.27 127.42 35.49 126.93 1002.81 4.37
35.32 127.45 35.49 126.93 756.71 3.24
36.97 126.5 37.28 126.98 262.64 1.16
37.4 127.21 37.28 126.98 118 0.49
36.9 126.59 37.28 126.98 114.9 0.49
35.27 127.42 35.16 126.99 180.78 0.61
I need to interpolate the data. (The gridded data must be shown within the limits as defined by the user as Y (35.5 - 36.5) and X (128.5 - 129.5)
How I can do it. Waiting for your kind reply.
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Muhammad Zafar Iqbal
Muhammad Zafar Iqbal 2020-6-5
val is the corresponding value and err is the standard error
Muhammad Zafar Iqbal
Muhammad Zafar Iqbal 2020-6-5
Dear KSSV
Thanks for your kind help.
I want to ask if we have only two lines as
140.5 35.25 140.75 35.5 10 1
140.25 35.5 140.5 35.75 5 2
What we have to change as when I run for only two lines the error message is
"Matrix dimensions must agree."
Thanks

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KSSV
KSSV 2020-6-5
data = [36.97 126.5 36.79 126.45 394.94 1.79
36.98 126.4 36.79 126.45 179.59 0.75
37 126.65 36.55 126.64 82.64 0.35
37.4 127.21 37.35 126.7 379.76 1.53
34.75 127.17 34.4 126.7 172.95 0.73
37.45 126.82 37.89 126.77 401.29 1.6
36.98 126.4 37.08 126.77 1168.43 4.97
37.4 127.21 37.89 126.77 114.6 0.52
35.32 127.45 34.98 126.9 289.95 1.19
36.97 126.5 37.49 126.92 3462.07 15.01
37.16 127.52 37.49 126.92 151.54 0.61
37.4 127.21 37.49 126.92 167.04 0.69
37.16 127.52 37.49 126.92 240.72 1.01
36.2 127.48 36.27 126.92 235.94 0.95
36.35 127.2 36.27 126.92 155.95 0.63
35.27 127.42 35.49 126.93 1002.81 4.37
35.32 127.45 35.49 126.93 756.71 3.24
36.97 126.5 37.28 126.98 262.64 1.16
37.4 127.21 37.28 126.98 118 0.49
36.9 126.59 37.28 126.98 114.9 0.49
35.27 127.42 35.16 126.99 180.78 0.61 ] ;
y1 = data(:,1) ; y2 = data(:,3) ;
x1 = data(:,2) ; x2 = data(:,4) ;
val = data(:,5) ; err = data(:,6) ;
m = 100 ;
xi = linspace(min(x1),max(x1),m) ;
yi = linspace(min(y1),max(y1),m) ;
[X,Y] = meshgrid(xi,yi) ;
V = griddata(x1,y1,val,X,Y) ;
pcolor(X,Y,V)
shading interp
  1 个评论
Muhammad Zafar Iqbal
Muhammad Zafar Iqbal 2020-6-6
Dear KSSV
I need your more help
for the same data, I need node values if possible.
Waiting here for your kind reply.

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