How can I set non-consecutive 'val' for 'accumarray'?

Hello,

simple question.

Is it available to set val from 'accumarray(x,val)' which is non-consecutive?

For example,

x = size of (1500, 1 ) double , // interestrates actually,

y = size of (1500, 1 ) timestamp,

I'd like to compress y with yyyyMMWW, and x with average of matched column.

but it seems 'val' is not possbile to use with non-consecutive.

B.RGDS/Jeremy

[Guillaume]

I don't really understand your question. The second input of accumarray can be any numerical value you want (including Inf and NaN). The first input must be a valid vector or matrix of indices, so strictly positive integers.

There's never any requirement for anything to be consecutive.

[madhan ravi]

Also illustrate your need with an example.

[Walter Roberson]

You should have a look at findgroups() and possibly groupstats()