i have two set of data for temperature measurements which vary depends on each other. the variation may be divided into three portions. how can we seperate these portions

Question

JINU SUDHAKARAN Mr 2023-6-12

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1981614-i-have-two-set-of-data-for-temperature-measurements-which-vary-depends-on-each-other-the-variation

编辑： Alan Stevens 2023-6-12

Book1.xlsx

i have two set of data for temperature measurements which vary depends on each other. the variation may be divided into three portions maybe fisrt portion is linear and followed by a curved portion in the graph (may be exponential) and again linear increase. I also have the data for these two temperatures

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

JINU SUDHAKARAN Mr 2023-6-12

The blue one is the important one. we need to select the region based on the blue one. initally a linear portion and then a curved portion. we need to divide the data exactly at the point in between these portion. how we can find that point?

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Alan Stevens 2023-6-12

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1981614-i-have-two-set-of-data-for-temperature-measurements-which-vary-depends-on-each-other-the-variation#answer_1254119

编辑：Alan Stevens 2023-6-12

在 MATLAB Online 中打开

Here's a possible way (assumes the data is already in the workspace):

dT2 = gradient(T2);
minval = min(dT2(Time<2.5));
ix = find(dT2(Time<2.5)==minval);
T2lin = T2(1:ix); T2nonlin = T2(ix+1:end);
plot(Time(1:ix),T2lin,Time(ix+1:end),T2nonlin),grid