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check for decrease and increase

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johnson saldanha
johnson saldanha 2018-11-5
评论： Image Analyst 2021-11-23
i have a matrix and check for a column to see if the values are rapidly decreasing in steps of five. how to check for it? for example the matrix is x and the second column.

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KSSV
KSSV 2018-11-5
Read about diff. This will get the difference of successive rows. If decreasing diff would be negative, if increasing diff will be positive.

更多回答（3 个）

madhan ravi
madhan ravi 2018-11-5
编辑：madhan ravi 2018-11-5
x=[100:-5:0] %an example
issorted(x,'strictdescend') %to check if they are sorted
abs(diff(x))==5
Image Analyst
Image Analyst 2018-11-5
编辑：Image Analyst 2021-11-23
Try the function findchangepts(), in versions of MATLAB r2016a and later.
Palnati saidatta
Palnati saidatta 2021-11-23
x=[100:-5:0] %an example
issorted(x,'strictdescend') %to check if they are sorted
abs(diff(x))==5

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