8000 feat: Added diff() function to DataFrame by NeonSpork · Pull Request #414 · javascriptdata/danfojs · GitHub
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feat: Added diff() function to DataFrame #414

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Merged
merged 8 commits into from
Mar 9, 2022
Merged

feat: Added diff() function to DataFrame #414

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6265d36
test: Added unit tests for diff() function
NeonSpork Mar 7, 2022
95a2060
chore(typedef): added diff function to interface
NeonSpork Mar 7, 2022
0baf658
test: correct and complete unit test of diff()
NeonSpork Mar 7, 2022
52ca0c4
feat: Added diff() function
NeonSpork Mar 7, 2022
acb651f
refactor: Rename variables with camelCase
NeonSpork Mar 8, 2022
63b46e8
refactor: remove duplication
NeonSpork Mar 8, 2022
4b685b3
feat(test): browser unit tests for `diff()`
NeonSpork Mar 8, 2022
8d4c911
chore: undo accidental change of description string
NeonSpork Mar 8, 2022
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test: Added unit tests for diff() function
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@NeonSpork
NeonSpork committed Mar 7, 2022
commit 6265d36e33347e4a07116274ff54ca3bb4f9d05c
39 changes: 39 additions & 0 deletions src/danfojs-node/test/core/frame.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -992,6 +992,45 @@ describe("DataFrame", function () {

});

describe("diff", function () {
it("Return difference of DataFrame with previous row", function () {
const data = [[0, 2, 4], [10, 10, 10], [1, 2, 3]];
const df = new DataFrame(data);
assert.deepEqual((df.diff(1) as DataFrame).values, [[NaN, NaN, NaN], [10, 8, 6], [-9, -8, -7]]);
});
it("Return difference of DataFrame with following row", function () {
const data = [[0, 2, 4], [10, 10, 10], [1, 2, 3]];
const df = new DataFrame(data);
assert.deepEqual((df.diff(-1) as DataFrame).values, [[-2, 0, 2], [8, 8, 8], [-1, 0, 1]]);
});
it("Return difference of a DataFrame with a Series along default axis 1", function () {
const data = [[0, 2, 4], [10, 10, 10], [1, 2, 3]];
const sf = new Series([1, 2, 1]);
const df = new DataFrame(data);
assert.deepEqual((df.diff(sf) as DataFrame).values, [[-1, 0, 3], [9, 8, 9], [0, 0, 2]]);
});
it("Return difference of a DataFrame with along axis 0 (column-wise), previous column", function () {
const data = [[0, 2, 4], [10, 10, 10], [1, 2, 3]];
const df = new DataFrame(data);
assert.deepEqual((df.diff(1, { axis: 0 }) as DataFrame).values, [[NaN, 2, 2], [NaN, 0, 0], [NaN, 1, 1]]);
});
it("Return difference of a DataFrame with along axis 0 (column-wise), following column", function () {
const data = [[0, 2, 4], [10, 10, 10], [1, 2, 3]];
const df = new DataFrame(data);
assert.deepEqual((df.diff(1, { axis: 0 }) as DataFrame).values, [[-2, 2, NaN], [0, 0, NaN], [1, 1, NaN]]);
});
it("Return difference of a DataFrame with another DataFrame along default axis 1", function () {
const df1 = new DataFrame([[0, 2, 4], [3, 10, 4]]);
const df2 = new DataFrame([[1, 2, 4], [10, 5, 0]]);
assert.deepEqual((df1.diff(df2) as DataFrame).values, [[-1, 0, 0], [-7, 5, 4]]);
});
it("Return difference of a DataFrame with another DataFrame along axis 0", function () {
const df1 = new DataFrame([[0, 2, 4], [3, 10, 4]]);
const df2 = new DataFrame([[1, 2, 4], [10, 5, 0]]);
assert.deepEqual((df1.diff(df2, { axis: 0 }) as DataFrame).values, [[-1, 0, 0], [-7, 5, 4]]);
});
});

describe("mod", function () {
it("Return modulus of DataFrame with a single Number", function () {
const data = [[0, 2, 4], [360, 180, 360]];
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