Fix linear detrend (#676)

myd7349 · web-flow · commit 4c21e6967864 · 2023-09-23T09:13:16.000+03:00
diff --git a/src/data_handler/data_handler.cpp b/src/data_handler/data_handler.cpp
@@ -1207,7 +1207,7 @@ int detrend (double *data, int data_len, int detrend_operation)
     if (detrend_operation == (int)DetrendOperations::LINEAR)
     {
         // use mean and gradient to find a line
-        double mean_x = data_len / 2.0;
+        double mean_x = (data_len - 1) / 2.0;
         double mean_y = 0;
         for (int i = 0; i < data_len; i++)
         {

Original file line number	Diff line number	Diff line change
`@@ -1207,7 +1207,7 @@ int detrend (double *data, int data_len, int detrend_operation)`
`1207`	`1207`	`if (detrend_operation == (int)DetrendOperations::LINEAR)`
`1208`	`1208`	`{`
`1209`	`1209`	`// use mean and gradient to find a line`
`1210`		`- double mean_x = data_len / 2.0;`
	`1210`	`+ double mean_x = (data_len - 1) / 2.0;`
`1211`	`1211`	`double mean_y = 0;`
`1212`	`1212`	`for (int i = 0; i < data_len; i++)`
`1213`	`1213`	`{`