@cumsum |

Cumulative sums of a series or of the elements of a matrix.

• Compute the sum of the values in the series x from the start of the workfile or sample s, up to the current observation:

Syntax: @cumsum(x[, s])

x: series

s: (optional) sample string or object

Return: series

• Compute the cumulative sum of the elements of the matrix in vec order.

Syntax: @cumsum(m)

m: matrix, vector

Return: matrix, vector

Compute the cumulative sum of the values in x from the start of the workfile or sample s, up to the current observation:

This function is panel aware.

Examples

series x = @cumsum(@nrnd)

generates a random walk process x with standard normal errors, initialized at a draw from the standard normal distribution.

Cross-references

For the backward variant of this function for series, see
@cumbsum.