Multi dimensional array

Didn't you ask this before, and Derek responded with this?

Regards,

Andrew.

Hi Andrew,

I think we're not on the same page on this one. The past inputs on array have been on one-dimensional arrays but I'm trying to do a multi dimensional array this time. I've tried to search the documentation (Skill language reference) but either I've overlooked it or else it's not there. Could you please clarify if multi dimensional arrays can be done & if so, then how? I shall much appreciate your input.

Thanks,

Adil.

Andrew Beckett said:

Didn't you ask this before, and Derek responded with this?

Regards,

Andrew.

Hi Adil,

You can do this easily with a table:

data=makeTable('myData 0) ; the 0 is the default value you want to return

data[list(3 2)]=45
data[list(5 6)]=123

Because the table can have anything you want as the key, passing a list of an X and Y value is perfectly acceptable. Derek mentioned this in his post.

Or you could create a multi-dimensional array very simply by using SKILL as follows. Essentially SKILL supports simple (single dimension) arrays, but it's easy to create an array which is an array of arrays).

/* abMultiDimArray.il

Author     A.D.Beckett
Group      Custom IC (UK), Cadence Design Systems Ltd.
Language   SKILL
Date       Nov 23, 2009 
Modified   
By         

Function for creating a multi-dimensional array.

Usage:

data=abMultiDimArray(6 8)

Creates a 6 by 8 array (starting index is from 0). Then you can use:

data[4][5]=23
data[0][7]=123

You can specify more dimensions by passing more arguments to abMultiDimArray.

***************************************************

SCCS Info: @(#) abMultiDimArray.il 11/23/09.16:24:27 1.1

*/

procedure(abMultiDimArray(@rest dimensions)
    let((arr)
	if(integerp(car(dimensions)) && plusp(car(dimensions)) then
	    arr=makeVector(car(dimensions))
	    when(cdr(dimensions)
		for(ind 0 sub1(car(dimensions))
		    arr[ind]=apply('abMultiDimArray cdr(dimensions))
		)
	    ) ; when 
	    arr
	else
	    error("Dimension %L must be a positive integer\n" car(dimensions))
	) ; if
    ) ; let
) ; procedure 

Regards,

Andrew.

Hi Andrew,

Thanks a lot for your suggestions. The small piece of your code is very instructive indeed in order to understand how to build an array of arrays. I've tried it & it works just fine. I wish this example was included in the documentation.

Regards,

Adil.  

Andrew Beckett said:

Hi Adil,

You can do this easily with a table:

data=makeTable('myData 0) ; the 0 is the default value you want to return

data[list(3 2)]=45
data[list(5 6)]=123

Because the table can have anything you want as the key, passing a list of an X and Y value is perfectly acceptable. Derek mentioned this in his post.

Or you could create a multi-dimensional array very simply by using SKILL as follows. Essentially SKILL supports simple (single dimension) arrays, but it's easy to create an array which is an array of arrays).

/* abMultiDimArray.il

Author     A.D.Beckett
Group      Custom IC (UK), Cadence Design Systems Ltd.
Language   SKILL
Date       Nov 23, 2009 
Modified   
By         

Function for creating a multi-dimensional array.

Usage:

data=abMultiDimArray(6 8)

Creates a 6 by 8 array (starting index is from 0). Then you can use:

data[4][5]=23
data[0][7]=123

You can specify more dimensions by passing more arguments to abMultiDimArray.

***************************************************

SCCS Info: @(#) abMultiDimArray.il 11/23/09.16:24:27 1.1

*/

procedure(abMultiDimArray(@rest dimensions)
    let((arr)
	if(integerp(car(dimensions)) && plusp(car(dimensions)) then
	    arr=makeVector(car(dimensions))
	    when(cdr(dimensions)
		for(ind 0 sub1(car(dimensions))
		    arr[ind]=apply('abMultiDimArray cdr(dimensions))
		)
	    ) ; when 
	    arr
	else
	    error("Dimension %L must be a positive integer\n" car(dimensions))
	) ; if
    ) ; let
) ; procedure 

Regards,

Andrew.

 

Hi Adil,

There is an example in the SKILL Language User Guide which talks about implementing sparse 2D arrays (using makeTable), and in fact the documentation on arrays talks about storing an array within another array (although doesn't give an example like mine).

I'll probably write the above up as a Cadence Online Support solution.

Regards,

Andrew.