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version 1.1, 2019/02/22 22:26:44

version 1.2, 2019/02/24 18:34:11

Line 104 animate - set to zero to plot a still im

show - set to zero to turn off image display. typically useful only

if you are writing images to disk.

in an ipython session, the values of colorshift, dpi, and nframes will

in an ipython session, the colormap and plotting variable will be saved

be saved between invocations of the script. so will the colormap,

between invocations of the script, as will the most recent values of l,

plotting variable, and the most recent values of l, m, and n. saving,

m, and n. saving, however, must be turned on with very invocation.

however, must be turned on with very invocation.

Section 2: addharmonics.py

Line 125 run the script again.

Line 124 run the script again.

this script also has an additional input parameter, freqscale. this is

the floating point value by which to multiply the frequencies of the

modes. these frequencies come from a model. since they are given in

units of millihertz and the sun's peak acoustic power occurs at about 3 mHz,

units of millihertz and the sun's peak acoustic power occurs at about 3

the default value of freqscale is 1/3 . to

mHz, the default value of freqscale is 1/3 . to see the sum evolve

see the sum evolve further in time, increase freqscale. you may want to

further in time, increase freqscale. you may want to simultaneously

simultaneously increase nframes.

increase nframes.

when we evolve the sum in time for the animation, it may so happen that a

when we evolve the sum in time for the animation, it may so happen that

frame will exceed the data range of the first frame, which is what we use

a frame will exceed the data range of the first frame, which is what we

by default to set the color scaling. by setting colorshift=2, you can tell

use by default to set the color scaling. by setting colorshift=2, you

the script to scan through the frames ahead of time and set the range

can tell the script to scan through the frames ahead of time and set the

of the color scale accordingly. however, the default setting would only result

range of the color scale accordingly. however, the default setting

in some areas of the image being saturated, and this may be perfectly acceptable

would only result in some areas of the image being saturated, and this

for many purposes.

may be perfectly acceptable for many purposes.

another difference is that the value of n is used to compute all

plotting variables, because the modes are added together according to

Legend: