[Matplotlib-users] Scientific notation digits at left-bottom corner of figure

Sun Oct 29 22:42:06 EDT 2017

Hi All,

You can try to run the following code.
If I put the mouse on the figure, the digit of x axis displayed on the left-bottom corner is scientific notation which is not what I want. I want it to be decimal notation.

testdata = np.arange(0, 10000000, 1)

# fmt_no_sci = ScalarFormatter(useOffset=False)
# fmt_no_sci.set_scientific(False)
# ax.fmt_xaxis = fmt_no_sci

from matplotlib.ticker import ScalarFormatter

fmt_no_sci = ScalarFormatter(useOffset=False)
fmt_no_sci.set_scientific(True)  # NOTE True instead of False.

fig = plt.figure()
ax = fig.add_subplot(111)
ax.plot(testdata)
ax.fmt_xaxis = fmt_no_sci
plt.show(0)

Best Regards,
Ardeal Liang

From: Ardeal LIANG [mailto:ardeal.liang at lighting.com]
Sent: 2017年10月30日 10:37
To: Jody Klymak <jklymak at uvic.ca>; Ardeal LIANG <ardeal.liang at philips.com>
Cc: Firing Eric <efiring at hawaii.edu>; matplotlib-users at python.org
Subject: RE: [Matplotlib-users] Scientific notation digits at left-bottom corner of figure

Hi Jody,

I apologize if I said it backwards!
I think you now get what I want.

I tried your code. It didn’t work still.

Best Regards,
Ardeal Liang

From: Jody Klymak [mailto:jklymak at uvic.ca]
Sent: 2017年10月30日 10:34
To: Ardeal LIANG <ardeal.liang at philips.com<mailto:ardeal.liang at philips.com>>
Cc: Firing Eric <efiring at hawaii.edu<mailto:efiring at hawaii.edu>>; matplotlib-users at python.org<mailto:matplotlib-users at python.org>
Subject: Re: [Matplotlib-users] Scientific notation digits at left-bottom corner of figure

Did you try:

from matplotlib.ticker import ScalarFormatter

fmt_no_sci = ScalarFormatter(useOffset=False)
fmt_no_sci.set_scientific(True)  # NOTE True instead of False.

I think you just said it backwards: You want scientific ntoation, not decimal notation.

Cheers,   Jody

On Oct 29, 2017, at  19:29 PM, Ardeal LIANG <ardeal.liang at philips.com<mailto:ardeal.liang at philips.com>> wrote:

Hi Jody,

Please check the red ellipse in the picture.

I want the value 1.85092e+06 to be 1850922 in the red ellipse in the following picture.

fmt_no_sci = ScalarFormatter(useOffset=False)
fmt_no_sci.set_scientific(False)
# ax.fmt_xaxis = fmt_no_sci

fig = plt.figure()
ax = fig.add_subplot(111)
ax.plot(testdata)
ax.fmt_xaxis = fmt_no_sci
plt.show(0)

The x axis value displayed at the left-bottom corner of the figure is still scientific notation, but not decimal notation.
Please check the x axis value displayed at the left-bottom corner of the figure in the red circle.
<image001.jpg>

Best Regards,
Ardeal Liang

From: Jody Klymak [mailto:jklymak at uvic.ca]
Sent: 2017年10月30日 10:24
To: Ardeal LIANG <ardeal.liang at philips.com<mailto:ardeal.liang at philips.com>>
Cc: Firing Eric <efiring at hawaii.edu<mailto:efiring at hawaii.edu>>; matplotlib-users at python.org<mailto:matplotlib-users at python.org>
Subject: Re: [Matplotlib-users] Scientific notation digits at left-bottom corner of figure

On Oct 29, 2017, at  17:46 PM, Ardeal LIANG <ardeal.liang at philips.com<mailto:ardeal.liang at philips.com>> wrote:

HI Eric,

Did you review the picture attached in my former email?
I suspect you go to the wrong direction about what I want to ask.

Best Regards,
Ardeal Liang

Hi Ardeal,

Its not clear to me what you want.  Do you want 3.2 x 10^3 instead of 0.0032?  The former is scientific and the latter decimal.

Thanks,  Jody

-----Original Message-----
From: Eric Firing [mailto:efiring at hawaii.edu]
Sent: 2017年10月28日 1:23
To: Ardeal LIANG <ardeal.liang at philips.com<mailto:ardeal.liang at philips.com>>; matplotlib-users at python.org<mailto:matplotlib-users at python.org>
Subject: Re: [Matplotlib-users] Scientific notation digits at left-bottom corner of figure

I'm getting a different result, but on the basic point we now agree:
the ScalarFormatter is not the right tool for this.  What you need is a function that takes a number and returns the kind of string you want.

Examples:

def format_as_int(num):
    return str(int(num))

def format_float_no_sci(num):
    return "%f" % num

Eric

On 2017/10/26 10:07 PM, Ardeal LIANG wrote:

Hi Eric,

I added your code to my code:

*from *matplotlib.ticker *import *ScalarFormatter

fmt_no_sci = ScalarFormatter(useOffset=False)
fmt_no_sci.set_scientific(False)

/# ax.fmt_xaxis = fmt_no_sci

/prow = 4
pcol = 1
pidx = 0
fig = plt.figure()
pidx += 1
axx = fig.add_subplot(prow, pcol, pidx, ylabel=*'rawdata'*)
axx.plot(np.abs(testdata))

axx.fmt_xaxis = fmt_no_sci

The *x axis value displayed at the left-bottom corner of the figure*is
still scientific notation, but not decimal notation.

Best Regards,

Ardeal Liang

-----Original Message-----
From: Matplotlib-users
[mailto:matplotlib-users-bounces+ardeal.liang=philips.com at python.org]
On Behalf Of Eric Firing
Sent: 2017年10月27日 16:00
To: matplotlib-users at python.org<mailto:matplotlib-users at python.org>
Subject: Re: [Matplotlib-users] Scientific notation digits at
left-bottom corner of figure

On 2017/10/26 9:50 PM, Ardeal LIANG wrote:

Hi,

If I put the mouse on the figure, x and y axis are displayed on the

left-bottom corner of the figure.

but the x axis is displayed as scientific notation, I want it to be

displayed as decimal notation.

how to make x axis or y axis values displayed as decimal notation
on

the left-bottom corner?

*Best Regards,*

*Ardeal Liang*

Something like this, assuming your Axes is ax:

from matplotlib.ticker import ScalarFormatter

fmt_no_sci = ScalarFormatter(useOffset=False)

fmt_no_sci.set_scientific(False)

ax.fmt_xaxis = fmt_no_sci

Eric

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The information contained in this email may be confidential and/or legally protected under applicable law. The message is intended solely for the addressee(s). If you are not the intended recipient, you are hereby notified that any use, forwarding, dissemination, or reproduction of this email is strictly prohibited and may be unlawful. If you are not the intended recipient, please contact the sender by return e-mail and destroy all copies of the original email.
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