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Spreadsheet: Implement the mode function

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My statistics course has gotten to me :^)
This commit is contained in:
kleines Filmröllchen 2022-01-14 15:02:44 +01:00 committed by Ali Mohammad Pur
parent 7851151cfb
commit c4013f72a3
1 changed files with 45 additions and 2 deletions
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47
Base/res/js/Spreadsheet/runtime.js
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@ -351,6 +351,29 @@ function variance(cells) {
return (count * squares - sums * sums) / count;
}
function mode(cells) {
const counts = numericReduce(
(map, x) => {
if (!map.has(x)) map.set(x, 0);
map.set(x, map.get(x) + 1);
return map;
},
new Map(),
cells
);
let mostCommonValue = undefined;
let mostCommonCount = -1;
counts.forEach((count, value) => {
if (count > mostCommonCount) {
mostCommonCount = count;
mostCommonValue = value;
}
});
return mostCommonValue;
}
function stddev(cells) {
return Math.sqrt(variance(cells));
}
@ -727,15 +750,24 @@ variance.__documentation = JSON.stringify({
},
},
E4: {
kind: "Formula",
source: "mode(R`A0:C4`)",
value: "1",
type: "Numeric",
type_metadata: {
format: "mode: %d",
},
},
E5: {
kind: "Formula",
source: "count(R`A0:C4`)",
value: "15",
value: "12",
type: "Numeric",
type_metadata: {
format: "count: %d",
},
},
E5: {
E6: {
kind: "Formula",
source: "sum(R`A0:C4`)",
value: "18",
@ -771,6 +803,17 @@ variance.__documentation = JSON.stringify({
},
});
mode.__documentation = JSON.stringify({
name: "mode",
argc: 1,
argnames: ["cell names"],
doc: "Calculates the mode of the numeric values in the given range of cells, i.e. the value that appears most often",
examples: {
'mode(range("A2", "A14"))':
"Calculate the mode of the values in A2:A14, [Click to view](spreadsheet://example/variance#simple)",
},
});
stddev.__documentation = JSON.stringify({
name: "stddev",
argc: 1,