I have a component button that gives me a random numer in a MathContainer each time a press it.

How can I store such random number output in a list. I want to have a list of values where the first value in the list is the

random number that appeared the first time I pressed the button, the second value in the list is the random number that

appeared the second time I  pressed the button etc etc

I know how to access output  from a MathContainer

I have a Bivariate Distribution that has a PDF equal to 

(1/2)*exp(-RootOf(erf(_Z)*b*exp(exp((-x+a)/b))+b*exp(exp((-x+a)/b))-2*exp((-x+a)/b))^2-RootOf(erf(_Z)*sqrt(Pi)*d+sqrt(Pi)*d-sqrt(2)*exp(-(1/2)*(-y+c)^2/d^2))^2)/Pi

(1/2)*exp(-RootOf(erf(_Z)*b*exp(exp((-x+a)/b))+b*exp(exp((-x+a)/b))-2*exp((-x+a)/b))^2-RootOf(erf(_Z)*sqrt(Pi)*d+sqrt(Pi)*d-sqrt(2)*exp(-(1/2)*(-y+c)^2/d^2))^2)/Pi

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I have a matrix with 3 columns of datapoints (as seen in attached file).

I use pointplot3d to create the below picture but how can I get a 2d contourplot of the data ?

I have 103 tables ( aal_l,  abf_l  etc )  which each has columns D, T, O, H, C  etc 

I want to exctract column C for all 103 table and store the result in a matrix

I know how to extract column C for one table

convert(connection:-ExecuteQuery("select C from aal_l", 'output' = Array), Matrix)

but how can it be done for multiple tables ...?

I loaded a 1600*3 matrix into Maple 12  from my mysql datbase on my computer and it took 3 minutes to load it .

I assume that the speed will be increase significantly if I had a fast internet connection ( both up and down ).

My Internet connection (tcp / ip) is extremly slow !!    Is this correct ?   Are there any other way to speed up the data exchange ?