Sample data from time-dependent array

Question

Dustin Harper 2019-9-16

0
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https://ww2.mathworks.cn/matlabcentral/answers/480680-sample-data-from-time-dependent-array

评论： Dustin Harper 2019-9-16

Hi, apologies as I am somewhat new to Matlab.

I have two columns of data in a matrix (time, and an array of temperature data). The data is irregularly spaced in time.

For example (time on left and temp on right):

228.0000 23.7800

236.0000 23.8767

244.0000 23.9400

256.0000 24.1400

268.0000 23.8200

276.0000 24.0700

Using this time-dependent data, I'd like to predict temperature values for a new time array. The new time array is different from the first in that there are repeat times (i.e., 236.0000 below), and new times that did not exist in the first (i.e., 246.0000 below).

For example:

228.0000 ?

236.0000 ?

244.0000 ?

246.0000 ?

256.0000 ?

268.0000 ?

276.0000 ?

Thanks for the patience and help!

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Answer 1

Andrei Bobrov 2019-9-16

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https://ww2.mathworks.cn/matlabcentral/answers/480680-sample-data-from-time-dependent-array#answer_392162

data = [  228.0000    23.7800
0000    23.8767
0000    23.9400
0000    24.1400
0000    23.8200
0000    24.0700];
data2 = [  228.0000
0000
0000
0000
0000
0000
0000
0000
0000   ];
out = interp1(data(:,1),data(:,2),data2);