# cumwsumTopN {#cumwsumtopn}

## Syntax {#syntax}

`cumwsumTopN(X, Y, S, top, [ascending=true], [tiesMethod='latest'])`

Please see [Cumulative Moving TopN Functions](../Themes/cumTopN.md) for the parameters and windowing logic.

## Details {#details}

The function stably sorts *X* and *Y* by *S* in the order specified by *ascending*, then calculates the moving sums of *X* with *Y* as weights in a cumulative window.

**Return value**: DOUBLE type

## Examples {#examples}

```
X=1 2 3 10 13 4 3
Y = 1 7 8 9 0 5 8
S = 0.3 0.5 0.1 0.1 0.5 0.2 0.4
cumwsumTopN(X, Y, S, 6, 3)
// output: [1,15,39,129,129,149,159]
```

