RANDOM and CAS

[Helge Gabert]

In CAS, RANDOM(), with three arguments, appears to be only working for lists of size 11 or less, e..g.

RANDOM(11,0,10) OK
RANDOM(12,0,10) "Error: Invalid dimension."

No problem in Home! This is with firmware 6940 (now pulled). Not sure if this was OK in the previous firmware.

[parisse]

RANDOM in CAS with 3 args n,a,b does not the same as in Home. In CAS, you take n integer values between a and b but once the value has been selected you can not get it again (in contrast with randvector). For example, RANDOM(11,0,10) is a permutation and RANDOM(12,0,10) is indeed invalid dimension.
In Home, it seems you take 11 floating point values between 0 and 10.

[Gerald H]

(12-13-2014 06:28 PM)Helge Gabert Wrote:  In CAS, RANDOM(), with three arguments, appears to be only working for lists of size 11 or less, e..g.

RANDOM(11,0,10) OK
RANDOM(12,0,10) "Error: Invalid dimension."

No problem in Home! This is with firmware 6940 (now pulled). Not sure if this was OK in the previous firmware.

Bug confirmed, also with the new debugged & withdrawn version.

[Marcus von Cube]

(12-14-2014 09:52 AM)Gerald H Wrote:  

(12-13-2014 06:28 PM)Helge Gabert Wrote:  In CAS, RANDOM(), with three arguments, appears to be only working for lists of size 11 or less, e..g.

RANDOM(11,0,10) OK
RANDOM(12,0,10) "Error: Invalid dimension."

No problem in Home! This is with firmware 6940 (now pulled). Not sure if this was OK in the previous firmware.

Bug confirmed, also with the new debugged & withdrawn version.

It's a case problem. If you type "random" instead of RANDOM then you get the Home behavior in CAS. If you type RANDOM you see the error.

[Helge Gabert]

Yes, it is a case error, I agree. There needs to be "random" in the catalog.

Also, it should be made clear in the help catalog that RANDOM in CAS works (but as a permutation without replacement), and an entry for "randvector" is due.