Defining an array based on an integer parameter

JGoode — Mon, 26 Sep 2022 20:41:10 GMT

Hello,

I'm trying to define an array by an integer. I want my array to have an equal amount of fields as an integer. I want to be able to use the array fields to define positions of elements so they need to hold the values while more are added or removed based on the integer.

This is what I have currently, however it locks the value to 0 as I would expect. I'm just not sure how to achieve what I'm after.

DIM num_position_x2[] DIM num_position_y2[] if (glob_modpar_name = "num_steps") or (glob_modpar_name = "total_distance") then for i=1 to num_steps2 num_position_x2[i] = 0 num_position_y2[i] = 0 next i parameters num_position_x2=num_position_x2 parameters num_position_y2=num_position_y2 endif

Thanks!

Re: Defining an array based on an integer parameter

runxel — Thu, 08 Sep 2022 14:43:36 GMT

You're on the right track!

You will need to shadow the parameters. I have prepared a small but working example, which can be easily extended to suit all your needs.

dim EMPTYARRAY[] if GLOB_MODPAR_NAME = "n_steps" then if n_steps_shadow < n_steps then ! We have more steps than before for i=(n_steps_shadow+1) to n_steps ! init those values x_pos[i] = 0.0 next i else ! Less steps then before dim _newx[] for i=1 to n_steps _newx[i] = x_pos[i] next i x_pos = EMPTYARRAY x_pos = _newx endif n_steps_shadow = n_steps endif parameters \ x_pos = x_pos, n_steps_shadow = n_steps_shadow

topic Defining an array based on an integer parameter in GDL

Defining an array based on an integer parameter

Re: Defining an array based on an integer parameter