## 375 Reputation

16 years, 114 days

## confused about storing arrays in variabl...

Maple

array.mw

if I assign an array to the variable name x via another named array (A) then if I change all of A, x remains unchanged. this is what I'd expect

however if I change just one element of A then x also changes

this is illustrated in the attached worksheet.

Why is this happening? And how can I stop x from changing if I change a single elment of A?

thanks

## export as html...

Maple

Hi

I'm exporting arrays of plots as html (so I get multiple gif files). At the moment I do this off the menus (file\export as) is there a way to write this command at the prompt in worksheet mode?

thanks

## dumb question: Matrix v Array...

Maple

Hi

I guess I should know this but what is the difference between a Matrix and an Array in Maple?

thanks

## Mann Whitney test...

Maple

Hi

does anyone know where I can find a procedure for an exact calculation of the Mann Whitney test (uses a recursive formula so non-trivial).

thanks!

## Frequency plot: quantiles...

Maple

Hi

Does anyone know how I can shade say the top 5% of a frequency plot. Imagine the frequency plot is generated in the following way:

with(Statistics):with(plots):
N := RandomVariable(Normal(0, 1)):
A := Sample(N, 500):
Q := FrequencyPlot(A, thickness = 3):

I thought

P:=FrequencyPlot(A,x=-3..-1,fill=true,colour=grey):
display(P,Q):

would work but no!

any good ideas??

thanks v much

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