Grid Difficulties

Community matplotlib-users
1

Greetings,

I’m having considerable difficulties in getting the
axes grid to display they way I would like it to. Basically, I’m
wanting to grid to be shown for all of the x/y-ticks displayed, but
only an irregular number show up. What I’m wanting to know is if my
code is wrong or am I’m completely overlooking something. My code is
below and an image can be found at http://forwarn.org/images/USDIFFtest.png.

Also, I might as well ask…is there a way to manually specify the
labels that are displayed on the colorbar? For instance, in the
example below, my values range from -5 to 4…how would I go about
making sure the last 5 was included in the colorbar? I’ll admit I
haven’t looked into this much as of now since the first question was /
is more pressing.

Thanks!

-Patrick Marsh

from future import division
import numpy as np
import pylab as P
import copy

def open_text(REGION,FIELD):

···

global DATAPATH1

global DATAPATH2
xaxis1,yaxis1,freq1 = np.loadtxt(DATAPATH1+‘bin_CUR_%s_%s.txt’ % (REGION, FIELD), unpack=True)

xaxis2,yaxis2,freq2 = np.loadtxt(DATAPATH2+‘bin_FUT_%s_%s.txt’ % (REGION, FIELD), unpack=True)
return(xaxis1,yaxis1,freq1,xaxis2,yaxis2,freq2)

if name == ‘main’:
#Main Program

TIME = ‘CUR’
REGION = ‘PLAINS’
FIELD = ‘CAPE-SHR6’

PATHS TO THE INPUT (DATA) AND OUTPUT (IMAGES) DIRECTORIES

DATAPATH1 = ‘E:/RESEARCH/CCSM_OUTPUT/CURRENT/BIN/’

DATAPATH2 = ‘E:/RESEARCH/CCSM_OUTPUT/FUTURE/BIN/’
IMAGEPATH = ‘E:/RESEARCH/IMAGES/%s/%s/%s/’ % (REGION, TIME, FIELD)

xaxis1,yaxis1,freq1,xaxis2,yaxis2,freq2 = open_text(REGION, FIELD)

TRANSFORM INTO THE CORRECT FORMAT

xaxis1 = xaxis1.reshape(51,-1).T
yaxis1 = yaxis1.reshape(51,-1).T
freq1 = freq1.reshape(51,-1).T
freq2 = freq1.reshape(51,-1).T

freq1 = freq1 / (12 * 12 * 20) # (121220 for PLAINS)…(294320 for EUR)

freq2 = freq2 / (12 * 12 * 20) # (121220 for PLAINS)…(294320 for EUR)

diff = freq1 - freq2

xaxis = np.log10(xaxis1)
yaxis = np.log10(yaxis1)

xaxis = xaxis1

yaxis = yaxis1

levs = np.arange(0,10,.1)

levs = np.arange(-5,5,.1)
xticks = [1,2,5,10,20,50,100,200,500,1000,2000,5000]
yticks = [1,2,5,10,20,50,100]

x = np.arange(1,10000,1)

P.figure(figsize=(8,8))

CS = P.contourf(xaxis,yaxis,diff,levs)
P.xlabel(’\nCAPE’)
P.ylabel(‘0-6 km Shear’)
P.xlim(0,3)
P.ylim(0,2)
P.xticks(np.log10(xticks),xticks,)
P.yticks(np.log10(yticks),yticks,)

P.plot(np.log10(x),(np.log10(10000/x)),color=‘black’, linewidth=2)
P.colorbar(drawedges=False, orientation=‘horizontal’)
P.grid(True)
P.gca().xaxis.grid(True, which=‘minor’,xdata=xticks,ydata=yticks)

P.title(‘Difference\nCentral U.S. Normalized Frequency Distribution’)
P.savefig(‘USDIFFtest.png’,dpi = 200)

2

embarrassed

Turns out I was looking at a “compressed” version of the image that didn’t have all the grid lines on. Examining the full version the image looks correct. I apologize for asking what is not a really dumb question.

However, the second question about the colorbar is still puzzling.

-Patrick

···

On Sat, Aug 23, 2008 at 9:49 AM, Patrick Marsh <marsh.patrick+matplotlib@…287…> wrote:

Greetings,

I’m having considerable difficulties in getting the
axes grid to display they way I would like it to. Basically, I’m
wanting to grid to be shown for all of the x/y-ticks displayed, but
only an irregular number show up. What I’m wanting to know is if my
code is wrong or am I’m completely overlooking something. My code is
below and an image can be found at http://forwarn.org/images/USDIFFtest.png.

Also, I might as well ask…is there a way to manually specify the
labels that are displayed on the colorbar? For instance, in the
example below, my values range from -5 to 4…how would I go about
making sure the last 5 was included in the colorbar? I’ll admit I
haven’t looked into this much as of now since the first question was /
is more pressing.

Thanks!

-Patrick Marsh

from future import division
import numpy as np
import pylab as P
import copy

def open_text(REGION,FIELD):

global DATAPATH1

global DATAPATH2
xaxis1,yaxis1,freq1 = np.loadtxt(DATAPATH1+‘bin_CUR_%s_%s.txt’ % (REGION, FIELD), unpack=True)

xaxis2,yaxis2,freq2 = np.loadtxt(DATAPATH2+‘bin_FUT_%s_%s.txt’ % (REGION, FIELD), unpack=True)
return(xaxis1,yaxis1,freq1,xaxis2,yaxis2,freq2)

if name == ‘main’:
#Main Program

TIME = ‘CUR’
REGION = ‘PLAINS’
FIELD = ‘CAPE-SHR6’

PATHS TO THE INPUT (DATA) AND OUTPUT (IMAGES) DIRECTORIES

DATAPATH1 = ‘E:/RESEARCH/CCSM_OUTPUT/CURRENT/BIN/’

DATAPATH2 = ‘E:/RESEARCH/CCSM_OUTPUT/FUTURE/BIN/’
IMAGEPATH = ‘E:/RESEARCH/IMAGES/%s/%s/%s/’ % (REGION, TIME, FIELD)

xaxis1,yaxis1,freq1,xaxis2,yaxis2,freq2 = open_text(REGION, FIELD)

TRANSFORM INTO THE CORRECT FORMAT

xaxis1 = xaxis1.reshape(51,-1).T
yaxis1 = yaxis1.reshape(51,-1).T
freq1 = freq1.reshape(51,-1).T
freq2 = freq1.reshape(51,-1).T

freq1 = freq1 / (12 * 12 * 20) # (121220 for PLAINS)…(294320 for EUR)

freq2 = freq2 / (12 * 12 * 20) # (121220 for PLAINS)…(294320 for EUR)

diff = freq1 - freq2

xaxis = np.log10(xaxis1)
yaxis = np.log10(yaxis1)

xaxis = xaxis1

yaxis = yaxis1

levs = np.arange(0,10,.1)

levs = np.arange(-5,5,.1)
xticks = [1,2,5,10,20,50,100,200,500,1000,2000,5000]
yticks = [1,2,5,10,20,50,100]

x = np.arange(1,10000,1)

P.figure(figsize=(8,8))

CS = P.contourf(xaxis,yaxis,diff,levs)
P.xlabel(‘\nCAPE’)
P.ylabel(‘0-6 km Shear’)
P.xlim(0,3)
P.ylim(0,2)
P.xticks(np.log10(xticks),xticks,)
P.yticks(np.log10(yticks),yticks,)

P.plot(np.log10(x),(np.log10(10000/x)),color=‘black’, linewidth=2)
P.colorbar(drawedges=False, orientation=‘horizontal’)
P.grid(True)
P.gca().xaxis.grid(True, which=‘minor’,xdata=xticks,ydata=yticks)

P.title(‘Difference\nCentral U.S. Normalized Frequency Distribution’)
P.savefig(‘USDIFFtest.png’,dpi = 200)