# [ncl-talk] Deleting multiple coordinate variables

Walter Hannah whannah at atmos.colostate.edu
Mon Nov 3 14:40:40 MST 2014

```Hi,

I recently noticed a bug in NCL 6.2.0. Deleting a single coordinate
variable works without an issue, but the newer method for deleting
multiple items at once, does not work for coordinate variables. I've
pasted a little NCL script below. If I'm not crazy, then the last
printVarSummary() should show that the variable "z" stilll has two
coordinate variables.

begin
;===========================================================================================
;===========================================================================================
line =
"---------------------------------------------------------------------------"
nx = 100
ny = 100

x = new(nx,double)
y = new(ny,double)
z = new((/ny,nx/),float)

x = fspan(0,nx-1,nx)
y = fspan(0,ny-1,ny)
z = random_uniform(0,1,(/ny,nx/))

z!0 = "y"
z!1 = "x"
z&y = y
z&x = x
;===========================================================================================
;===========================================================================================
print(""+line)
print("Here's what z looks like:")
print(""+line)
printVarSummary(z)

print(""+line)
delete(z&y)
print("The y-coord has been deleted")
print(""+line)
printVarSummary(z)

print(""+line)
z&y = y
print("Now we have replaced the y-coord")
print(""+line)
printVarSummary(z)

print(""+line)
print("Now both x and y coords have been deleted (but they are
still there!)")
delete([/z&y,z&x/])
print(""+line)
printVarSummary(z)
;===========================================================================================
;===========================================================================================
end

Thanks,
Walter Hannah
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