Default black and white plot.
the plot interface that creates a contour plot.
cnLineLabelPlacementMode = "constant", is one of the
three methods for controlling contour labels. the constant method is
the only one in which the label becames part of the line.
ZeroNegDashLineContour is the special
shea_util.shtml function that will take contours and make the
zero line double thickness, and the negative lines dashed. There
are many other
contour effects you can use.
There are four title strings you can use to label a plot. The
automatically labeled with the long_name of the data, and
labeled with the units of the data. These can both be overwritten, or
turned off (by setting them to ""). There is also
and the plot title
Adds color, turns on line labels, and adds a height axis.
cnFillOn = True, turns on a color plot.
cnLinesLabelsOn = Turn, turns on the contour line labels.
a special resource that tell the plot template to use the full range of
There are many built-in
to choose from and many ways of specifying the
color of a plot.
axis.ncl contains all the
functions used to put a height axis on the HAO
master scripts. We have used one of
these functions here (h_axis). To use this function, you
need to load axis.ncl at the top of your script.
Demonstrates manually setting contour intervals
cnLevelSelectionMode = "ManualLevels"
are the resources that manually sets the contour levels.
vpHeightF will allow you to stretch a plot.
Demonstrates a panel plot. There are too many nuances associated with
panelling. Please review the CCSM panel example page for details.
The NCL built-in function
dim_avg is useful for calculating zonal averages. You should be aware,
however of the
consequences on meta data of any computation. Because of this
we have chosen to use the
wrapper version of the function.
How to add the min/max to a plot and stretch its aspect ratio.
The NCL built-in functions
max allow you to take the min and max of the data.
trYMinF will limit the lower bounds of the y-axis.There is also a
Interpolates to height.
hao_contrib.ncl contains the
the function (zplev_to_height) used to interpolate a variable on the HAO
master scripts. To use this function, you
need to load hao_contrib.ncl at the top of your script.
This functions requires that you set a bottom and top height level to
interpolate to and the interval between the top and bottom.