From b6630876d336b823dcdc7a4de160b6446f30401f Mon Sep 17 00:00:00 2001 From: Matthew Date: Sat, 19 Feb 2022 08:41:38 -0500 Subject: [PATCH] remove impl details from docs Signed-off-by: mtfoley --- docs/querying/functions.md | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-) diff --git a/docs/querying/functions.md b/docs/querying/functions.md index 3b557a0e0..5da40a042 100644 --- a/docs/querying/functions.md +++ b/docs/querying/functions.md @@ -130,10 +130,7 @@ delta(cpu_temp_celsius{host="zeus"}[2h]) `deriv(v range-vector)` calculates the per-second derivative of the time series in a range vector `v`, using [simple linear regression](https://en.wikipedia.org/wiki/Simple_linear_regression). -The range vector must have at least two samples in order to perform the calculation. The linear -regression is used to calculate a slope and offset for a trend line, and the slope value is used -for the derivative calculation. In order to reduce calculation errors, the timestamp of the first -sample in the range vector is set as `x=0` within the linear regression algorithm. When `+Inf` or +The range vector must have at least two samples in order to perform the calculation. When `+Inf` or `-Inf` are found in the range vector, the slope and offset value calculated will be `NaN`. `deriv` should only be used with gauges. @@ -335,11 +332,7 @@ January etc. `t` seconds from now, based on the range vector `v`, using [simple linear regression](https://en.wikipedia.org/wiki/Simple_linear_regression). The range vector must have at least two samples in order to perform the -calculation. The linear regression is used to calculate a slope and offset -for a trend line, and the slope and offset are used to calculate the predict -the value of the time series. In order to reduce calculation errors, the -timestamp of the first sample in the range vector is set as `x=0` within the -linear regression algorithm. When `+Inf` or `-Inf` are found in the range vector, +calculation. When `+Inf` or `-Inf` are found in the range vector, the slope and offset value calculated will be `NaN`. `predict_linear` should only be used with gauges.