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-rwxr-xr-xapp/bits/assets/trendline.js53
1 files changed, 0 insertions, 53 deletions
diff --git a/app/bits/assets/trendline.js b/app/bits/assets/trendline.js
deleted file mode 100755
index 48e2522..0000000
--- a/app/bits/assets/trendline.js
+++ /dev/null
@@ -1,53 +0,0 @@
-function getAvg(arr) {
- const total = arr.reduce((acc, c) => acc + c, 0);
- return total / arr.length;
-}
-
-function getSum(arr) {
- return arr.reduce((acc, c) => acc + c, 0);
-}
-
-function trendline(data, xKey, yKey) {
- const xData = data.map((value) => value[xKey]);
- const yData = data.map((value) => value[yKey]);
-
- // average of X values and Y values
- const xMean = getAvg(xData);
- const yMean = getAvg(yData);
-
- // Subtract X or Y mean from corresponding axis value
- const xMinusxMean = xData.map((val) => val - xMean);
- const yMinusyMean = yData.map((val) => val - yMean);
-
- const xMinusxMeanSq = xMinusxMean.map((val) => Math.pow(val, 2));
-
- const xy = [];
- for (let x = 0; x < data.length; x++) {
- xy.push(xMinusxMean[x] * yMinusyMean[x]);
- }
-
- // const xy = xMinusxMean.map((val, index) => val * yMinusyMean[index]);
-
- const xySum = getSum(xy);
-
- // b1 is the slope
- const b1 = xySum / getSum(xMinusxMeanSq);
- // b0 is the start of the slope on the Y axis
- const b0 = yMean - b1 * xMean;
-
- return {
- slope: b1,
- yStart: b0,
- calcY: (x) => b0 + b1 * x,
- };
-}
-
-const averageDelta = ([x,...xs]) => {
- if (x === undefined)
- return NaN
- else
- return xs.reduce(
- ([acc, last], x) => [acc + (x - last), x],
- [0, x]
- ) [0] / xs.length
-} \ No newline at end of file