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发表于 2013-4-20 15:35:30
######## Example B2
### Step 1: Remove the exiting file named tmp.ps, if any. Don't
# be alarmed by the warning message "tmp.ps: No such file or directory"
rm tmp.ps
### Step 2: make the plot using blue triangles
awk '{print $2, $3}' neq.data | \
psxy -R1960/2000/0/30 -JX5/3 -St0.1 -G0/0/255 \
-Ba10f5/a5f1 -P -K -X1.5 -Y5 >tmp.ps
### Step 3: Plot the data again using a red line
awk '{print $2, $3}' neq.data | \
psxy -R -JX -W3/255/0/0 -O -K >>tmp.ps
### Step 4: Add some texts
pstext -R -JX -O -N <<END>>tmp.ps
1980 32 15 0 5 MC Number of Large Earthquakes per Year
1980 -5 15 0 5 MC Time (year)
1955 15 15 90 5 MC Number of events
1965 25 13 0 0 ML Minimum Magnitude: 7.0
END
##################### End of useful codes. ##############################
#~~~~~~~~~~~~~~~~~~~~~~~~~~ Detailed Explanations ~~~~~~~~~~~~~~~~~~~~~~~
############################# Step 1:
# rm tmp.ps
# Your output will be tmp.ps. This step removes existing file
# with the same name in the working directory.
# If you are asked "rm tmp.ps", answer "y".
############################# Step 2:
### make the plot using blue triangles
#awk '{print $2, $3}' neq.data | \
#psxy -R1960/2000/0/30 -JX5/3 -St0.1 -G0/0/255 \
#-Ba10f5/a5f1 -P -K -X1.5 -Y5 >tmp.ps
### Important: the paramters (e.g. -R, -J, -P, -K, -S, -X, -Y above)
# of all GMT commands have no order, meaning that you can
# put them wherever you want, as long as they are after
# the GMT command (psxy in this case) and before
# the ">" sign.
### psxy is a GMT command to make x-y plots
### -R is a parameter of psxy, defining the region to be ploted.
# The format for -R is X_min/X_max/Y_min/Y_max
### -J is a parameter for psxy
# X after -J means you want to use linear projection which
# is the most commonly used projection for x-y plotting.
# The "5" after -JX means you want the width of the
# map be 5 inches; and the "3" after -JX5/ means that the
# height of the plot will be 3 inches.
### -B defines the frame (Boundary) of your plot. a10 means you want
# an annotation every 10 units at the horizontal direction;
# The "f5" after -Ba10 means you want a "tick" every 5 units.
# "a5f1" after -Ba10f5/ is for the vertical axis.
### -P means you want to use Portrait mode instead of landscape mode.
# If you want to use landscape mode, remove the -P.
### -S is for selecting symbols. -St means you want to plot triangles
# (-Ss is for squares, -Sc for circles, -Sa for star, ....
# Type man psxy for more symbols).
# The "0.1" after -St defines the size of the triangles in inch.
### -G is a paramter for psxy used to fill the symbols with
# colors. The 3 numbers following -G give the red/green/blue level
# in the mixing. Each of the 3 colors range from 0 to 255.
### -K means that you will have more output below.
### -X1.5 means that you want your plot shifted by 1.5 inch to the right
# from the lowerleft corner of the paper
### -Y5 means that you want your plot shifted up by 5 inches
# from the lowerleft corner of the paper
### > is a 're-direction' sign. It means that you want the output
# file be written to the file tmp.ps. Without ">", the
# output will be on the screen (and rolling forever...)
### tmp.ps is your output graphic file (in Postscript format).
##################################### Step 3:
#Plot the data again using a red line
#awk '{print $2, $3}' neq.data | \
#psxy -R -JX -W3/255/0/0 -O -K >>tmp.ps
### awk, psxy, -R, -JX, and -K have the same meaning as in Step 2.
# You don't have to add numbers after -R, -JX etc, because this
# time psxy remembers the numbers entered in Step 2.
### -O means you want the output created by this step to be
# Overplotted on top of the output from the previous Steps.
### -W3/255/0/0 means you want the thickness of the pen be 3,
# and the color be full red (255), no green (0) and no blue (0)
### >> tmp.ps means you want to write the output file to tmp.ps, which
# was first created in Step 2.
################################# Step 4:
#pstext -R -JX -O -N <<END>>tmp.ps
#1980 32 15 0 5 MC Number of Large Earthquakes per Year
#1980 -5 15 0 5 MC Time (year)
#1955 15 15 90 5 MC Number of events
#1965 25 13 0 0 ML Minimum Magnitude: 7.0
#END
### pstext is a common GMT command to write texts.
### -R, -JX, have the same meaning as in Step 2.
# Note that you should not put a "-K" here because Step 3 will
# be the last GMT command and no future graphic file to add.
### -O means you want the output created by this step to be
# Overplotted on top of the output from the previous Steps.
### -N means that you want the texts be plotted even if they are
# outside the region given by -R
### <<END means that the following lines will be the input of pstext
# until the word "END" is met.
### >> tmp.ps means you want to write the output file to tmp.ps
### There are 6 numbers for pstext.
# The first one (e.g., 1980 in the first line), gives the x-coordinate of
# the texts;
# The 2nd one (32), gives the y-coordinates of the plot.
# The 3rd one (15) gives the size of the texts (15 is normal).
# The 4th one (0) gives the angle of the texts (90 will be vertical)
# The 5th one (5) gives the font number (there are 22 or so fonts).
# The 6th one (MC) means you want the texts be plotted at the Mid-Center
# of the location given by the first 2 numbers.
ps2jpeg150 tmp.ps
01 1963 11
02 1964 8
03 1965 8
04 1966 4
05 1967 0
06 1968 9
07 1969 8
08 1970 15
09 1971 12
10 1972 8
11 1973 9
12 1974 11
13 1975 13
14 1976 14
15 1977 10
16 1978 12
17 1979 8
18 1980 5
19 1981 6
20 1982 3
21 1983 4
22 1984 2
23 1985 4
24 1986 2
25 1987 4
26 1988 1
27 1989 2
28 1990 3
29 1991 2
30 1992 7
31 1993 8
32 1994 12
33 1995 18
34 1996 17
35 1997 16
36 1998 12
37 1999 20 |
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