/usr/share/ncarg/nclex/basic/basic03n.ncl is in libncarg-data 6.3.0-6build1.
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;
; This example demonstrates how to:
; 1. Create a scalar field data object and assign it to a plot.
; 2. Set resources using a resource file.
; 3. Set resources during object creation.
; 3. Set resources after object creation.
; Begin the ncl script.
begin
; ###########
; # FRAME 1 #
; ###########
; This frame demonstrates how to create and assign data to a contour plot.
; Create an X workstation.
wks = create "wks" windowWorkstationClass defaultapp
"wkPause" : "True"
end create
; Create a 5x5 integer variable.
data1=new((/5,5/), integer)
; Initialize the variable with data.
data1=(/(/3,4,4,5,5/), \
(/2,3,5,5,4/), \
(/2,4,5,4,4/), \
(/3,4,4,4,3/), \
(/3,3,3,3,3/)/)
; Create a scalar field object that will be used as a data set for a
; contour object. The sfDataArray resource is used to assign a data
; array to a scalar field data object.
field1 = create "field1" scalarFieldClass defaultapp
"sfDataArray" : data1
end create
; Create a contour plot object and assign the data using the
; cnScalarFieldData resource.
con1 = create "con1" contourPlotClass wks
"cnScalarFieldData" : field1
end create
; Draw the plot.
draw(con1)
; Update and clear the workstation.
frame(wks)
; ###########
; # FRAME 2 #
; ###########
; This frame demonstrates how to set resources using a resource file.
; Resources are read from a resource file called basic03.res because
; the first argument in the create call is "basic03". This resource file
; is only read at the time an application object is created.
; The resource file contains resource assignments that control the
; characteristics of a plot.
appid = create "basic03" appClass defaultapp
end create
; Create another workstation window and make it a child of the
; new application object by using the appid variable as the argument
; for the parent id. By making this a child of the application
; object, the resources that are set in the basic03.res resource
; file will apply to this object and its children.
wks2 = create "wks2" windowWorkstationClass appid
end create
; Create another contour plot object and assign the data.
; Notice that the parent id is wks2, making the contour object
; a child of the new workstation.
con2 = create "con2" contourPlotClass wks2
"cnScalarFieldData" : field1
end create
; The contour object is drawn with filled contours because there is
; a resource in basic03.res that specifies that contour fill is on.
draw(con2)
; Updates and clear the workstation.
frame(wks2)
; ###########
; # FRAME 3 #
; ###########
; This frame demonstrates how resources can be set when an object is
; created.
; A variable length list of resource name/value pairs specifies
; a resource and its value. In this example contour line labels are turned
; off by setting the "cnLineLabelsOn" resource to "False".
con3 = create "con3" contourPlotClass wks2
"cnScalarFieldData" : field1
"cnLineLabelsOn" : "False"
end create
; Draw the contour object.
draw (con3)
; Update and clear the workstation.
frame(wks2)
; ###########
; # FRAME 4 #
; ###########
; This frame demonstrates how to use the setvalues expression to set
; resources for an object that has already been created.
; The setvalues expression is used to assign values to the resources
; of a object whose id is given as the first argument in the expression.
; In this example, that argument is "con3."
;
; Any resource that is valid for the con3 object can be set in the following
; expression. In this example, setting "cnFillOn" to "False" turns
; contour fill off. By default, cnFillOn is "False", but since it
; is set to "True" in the resource file, we can override that value by
; using the setvalues expression.
setvalues con3
"cnFillOn" : "False"
end setvalues
; Draw the contour object.
draw (con3)
; Update and clear the workstation
frame(wks2)
; Clean up (deleting the parent object recursively deletes all of its
; children).
delete(wks)
delete(appid)
; End the ncl script.
end
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