How to manipulate arrays using case statements and boolean conditions?

[twinkletoes996]

In the vi that is attached I am trying to compare two values in two different arrays and delete the value that is equal to zero.  The values of each array are rounded to the closest integer.  Then I attempted to apply the ">0" boolean as the condition for my case statement, but I am getting an error.  Any tips on manipulating arrays with case statements?

[GerdW]

Hi twinkle,

you can't connect an array to the case selector. So you need a loop to run through your array... See attachment - but keep in mind it's not clear what you want to achieve with those case structures!

[twinkletoes996]

Thank you!!! that was a huge help. I don't think I need the case structures at all.  The next part of the code compares the 4 values in the array. 

If columns 0 and 1 are both positive -> output 1

If column 0 is negative and 1 is positive -> output 2

If columns 0 and 1 are both negative -> output 3

If column 0 is positive and 1 is negative -> output 4

(0 is x-axis value, 1 is y-axis value.....outputs are assigning quadrants to the combination)

Only one of the "AND" booleans will return true for each index.  Is there a way to initialize another array of outputs 1-4 depending on which AND returns true?

[twinkletoes996]

oops.  it compares the TWO** values in the array...

[GerdW]

Hi twinkle,

see example... You could also use several case structures or put your selection functions in a line using output of the earlier as input for false case...

Message Edited by GerdW on 04-08-2009 11:36 PM