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zncen
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zncen(ptcen)
or zncen(ptcen, ireg)
returns zone centered version of the 2-D point centered array PTCEN.
The result is (imax-1)-by-(jmax-1) if PTCEN is imax-by-jmax.
If the region number array IREG is specified, zones with region
number 0 are not included in the point centering operation.
Note that IREG should have dimensions imax-by-jmax, like
the input PTCEN array; the first row and column of IREG are ignored.
Without IREG, zncen(ptcen) is equivalent to ptcen(zcen,zcen).
unknown type function, documented at startup/std.i line 2623
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| SEE ALSO: |
ptcen, |
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zoom_factor
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zoom_factor, factor
sets the zoom factor for mouse-click zoom in and zoom out operations.
The default FACTOR is 1.5; FACTOR should always be greater than 1.0.
unknown type function, documented at startup/graph.i line 770
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| SEE ALSO: |
limits, |
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zroots
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zroots(a)
returns the vector of (complex) roots of the (complex)
polynomial: Sum(a(i)*x^(i-1)) using Laguerre's method.
The roots are sorted in order of increasing real parts. Call with
non-zero imsort keyword to sort into increasing imaginary parts.
See Numerical Recipes (Press, et. al., Cambridge Univ. Press 1988),
section 9.5.
unknown type function, documented at include/zroots.i line 27
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