topic Re: Library global array in GDL

Library global array

kmcw — Thu, 26 Sep 2024 11:11:22 GMT

HI I have A global object with a parameter xy[16][16]

Now I want to find the easiest way to get the content of xy[5][6].

The only way I actually get a result is:

k=LIBRARYGLOBAL ("glob_obj", "xy", cont_1, cont_2, cont_3,...) where cont_1=xy[1][1], cont_2=xy[1][2], cont_3=xy[1][3]

I have 16 cloums so i guess i'll need to go until ...,cont_15,cont_16,cont_17) to make cont_17 the field xy[2][1] but I havn't tried that.

Is there no more efficient way to "call" the content of a field?

Re: Library global array

Jochen Suehlo — Wed, 13 Mar 2024 17:05:33 GMT

Please read this topic:

https://community.graphisoft.com/t5/GDL/LIBRARYGLOBAL-vs-2-dimension-array/m-p/252379#M2866

Re: Library global array

kmcw — Wed, 13 Mar 2024 17:42:48 GMT

sorry, that comunication doesn't help me. They are talking about calling obejects etc...

Re: Library global array

runxel — Wed, 13 Mar 2024 18:22:40 GMT

Read carefully then. The concept is the same!

To quote myself and the GDL manual:

"Requests (and Libraryglobal is also a request) do not handle two-dimensional arrays."

And Kristian shows how to convert it back to a 2D array from a 1D one.

Only difference: You'll need to now the dimensions yourself, the request doesn't return them.

Re: Library global array

AllanP — Fri, 15 Mar 2024 14:38:59 GMT

The entire array has to be read up to the point of the number you wish to get,

either

k=LIBRARYGLOBAL ("glob_obj", "xy", cont_1, cont_2, cont_3,...)

or ..................

use an array function to read all the variables and then reconstruct the array in the new file

I set the array sizes in the global

!!------this bit is just to set some values for this test for j = 1 to 16 for ii = 1 to 18 xy[ii][j] = ii*100+j next ii next j parameters xy = xy !!------this bit is just to set some values for this test !!------this bit measures the size of the array and sets it as variables that can be read xy_array1 = vardim1(xy) xy_array2 = vardim2(xy) parameters xy_array1 = xy_array1 parameters xy_array2 = xy_array2 !!------this bit measures the size of the array and sets it as variables that can be read

then read the array,

you will see that the new array read will only be a 1 dimensional array

so a 1x288 rather than a 18x16 as per the original

!!!----READ THE ARRAY FROM THE LIBRARY GLOBAL INTO A NEW ARRAY "xy_Temp[][]"----!! dim xy_Temp[][] !!!___note you can just do a 1 dimensional array at this point !!!"dim xy_Temp[]" success0 = LIBRARYGLOBAL ("1-test GLOBAL", "xy", xy_Temp) success1 = LIBRARYGLOBAL ("1-test GLOBAL", "xy_array1", xy_array1) success2 = LIBRARYGLOBAL ("1-test GLOBAL", "xy_array2", xy_array2) !!!!if just reading from the array then you could just use co_ordinate1 = (xy_array2)*(6-1)+5 text2 0,1, vardim1(xy_Temp) text2 0,2, vardim2(xy_Temp) text2 0,3,xy_array1 text2 0,4,xy_array2 text2 0,5,xy_Temp[1][co_ordinate1] !!!----CONVERT 1 DIMENSIONAL ARRAY BACK TO 2 DIMENSIONAL ARRAY----!! dim xy[][] for j = 1 to xy_array1 for i = 1 to xy_array2 co_ordinate = (j-1)*xy_array2+i xy[j][i] = xy_Temp[1][co_ordinate] next i next j text2 0,7,xy[6][5] parameters xy = xy

I hope this helps

P.S.

if you don't want to convert it back to an array you only need :

dim xy_Temp[] success0 = LIBRARYGLOBAL ("1-test GLOBAL", "xy", xy_Temp) success2 = LIBRARYGLOBAL ("1-test GLOBAL", "xy_array2", xy_array2) co_ordinate1 = (xy_array2)*(6-1)+5 text2 0,5,xy_Temp[co_ordinate1]

and if the size of the array is always know(it wont change in the future) then you can replace the xy_array2 part with the fixed number.

Re: Library global array

kmcw — Thu, 18 Apr 2024 08:21:10 GMT

Thank you very much, I'll try that as soon as I have time.