find the interpolation of two values.

how to find values for this data in between

6 1.256 1.365 0.358 2.589 2.365 2.365 2.456

8 3.250 3.255 3.62 1.25 1.256 2.321 3.214

i would like to find values for 6.5, 7, 7.5 using matlab. which command need to be used please help me in this code.

Answer 1

[Image Analyst]

See if this is what you want. You can use linspace to make the 2 rows into 5 rows:

m = [...
    6     1.256    1.365    0.358    2.589    2.365    2.365    2.456
    8     3.250    3.255    3.62    1.25        1.256   2.321    3.214];
[rows, columns] = size(m);
m2 = zeros(rows + 3, columns);
for col = 1 : size(m, 2)
    m2(:, col) = linspace(m(1, col), m(2, col), 5);
end
m2

m2 = 5×8

6.0000 1.2560 1.3650 0.3580 2.5890 2.3650 2.3650 2.4560 6.5000 1.7545 1.8375 1.1735 2.2542 2.0878 2.3540 2.6455 7.0000 2.2530 2.3100 1.9890 1.9195 1.8105 2.3430 2.8350 7.5000 2.7515 2.7825 2.8045 1.5848 1.5333 2.3320 3.0245 8.0000 3.2500 3.2550 3.6200 1.2500 1.2560 2.3210 3.2140

Answer 2

[Ghazwan]

You need to have X and Y vector arrays. The X values need to incapsulate the requested points. You may use interp1 fucntion. For example:

X=[6     1.256  10  ];
Y=[8     3.250   8.5 ];
Ynew = interp1(X,Y,[6.5, 7, 7.5])

[solleti prabhakarchary]

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