--- a/using-plot-interactively/script.rst Wed Nov 17 23:24:57 2010 +0530
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,226 +0,0 @@
-.. Objectives
-.. ----------
-
-.. By the end of this tutorial you will --
-
-.. 1. Create simple plots of mathematical functions
-.. #. Use the Figure window to study plots better
-
-
-
-.. Prerequisites
-.. -------------
-
-.. Installation of required tools
-.. Ipython
-
-.. Author : Amit Sethi
- Internal Reviewer :
- External Reviewer :
- Checklist OK? : <put date stamp here, if OK> [2010-10-05]
-
-Script
--------
-{{{ Show the Title Slide }}}
-
-Hello and welcome to the tutorial on creating simple plots using
-Python.This tutorial is presented by the Fossee group.
-
-I hope you have IPython running on your computer.
-
-In this tutorial we will look at plot command and also how to study
-the plot using the UI.
-
-{{{ Show Outline Slide }}}
-
-Lets start ipython on your shell, type ::
-
- $ipython -pylab
-
-
-Pylab is a python library which provides plotting functionality.It
-also provides many other important mathematical and scientific
-functions. After running IPython -pylab in your shell if at the top of
-the result of this command, you see something like ::
-
-
- `ERROR: matplotlib could NOT be imported! Starting normal
- IPython.`
-
-
-{{{ Slide with Error written on it }}}
-
-
-Then you have to install matplotlib and run this command again.
-
-Now type in your ipython shell ::
-
- linpace?
-
-
-
-as the documentation says, it returns `num` evenly spaced samples,
-calculated over the interval start and stop. To illustrate this, lets
-do it form 1 to 100 and try 100 points. ::
-
- linspace(1,100,100)
-
-As you can see a sequence of numbers from 1 to 100 appears.
-
-Now lets try 200 points between 0 and 1 you do this by typing ::
-
-
- linspace(0,1,200)
-
-0 for start , 1 for stop and 200 for no of points. In linspace
-the start and stop points can be integers, decimals , or
-constants. Let's try and get 100 points between -pi to pi. Type ::
-
- p = linspace(-pi,pi,100)
-
-
-'pi' here is constant defined by pylab. Save this to the variable, p
-.
-
-If you now ::
-
- len(p)
-
-You will get the no. of points. len function gives the no of elements
-of a sequence.
-
-
-Let's try and plot a cosine curve between -pi and pi using these
-points. Simply type::
-
- plot(p,cos(points))
-
-
-Here cos(points) gets the cosine value at every corresponding point to
-p.
-
-
-We can also save cos(points) to variable cosine and plot it using
-plot.::
-
- cosine=cos(points)
-
- plot(p,cosine)
-
-
-
-Now do ::
-
- clf()
-
-this will clear the plot.
-
-This is done because any other plot we try to make shall come on the
-same drawing area. As we do not wish to clutter the area with
-overlaid plots , we just clear it with clf(). Now lets try a sine
-plot. ::
-
-
- plot(p,sin(p))
-
-
-
-
-The Window on which the plot appears can be used to study it better.
-
-{{{ Show the slide with all the buttons on it }}}
-
-First of all moving the mouse around gives us the point where mouse
-points at.
-
-Also we have some buttons the right most among them is
-for saving the file.
-
-Just click on it specifying the name of the file. We will save the plot
-by the name sin_curve in pdf format.
-
-
-
-{{{ Show how to save the file }}}
-
-As you can see I can specify format of file from the dropdown.
-
-Formats like png ,eps ,pdf, ps are available.
-
-Left to the save button is the slider button to specify the margins.
-
-{{{ Show how to zoom. Press zoom button and specify region to zoom }}}
-
-Left to this is zoom button to zoom into the plot. Just specify the
-region to zoom into.
-
-{{{ Press Move button and move the axes. }}}
-
-The button left to it can be used to move the axes of the plot.
-
-{{{ Press Back and Forward Button }}}
-
-The next two buttons with a left and right arrow icons change the state of the
-plot and take it to the previous state it was in. It more or less acts like a
-back and forward button in the browser.
-
-{{{ Press home button }}}
-
-The last one is 'home' referring to the initial plot.
-
-
-
-
-Following is an exercise that you must do.
-
-%% %% Plot (sin(x)*sin(x))/x .
- 1. Save the plot by the sinsquarebyx.pdf in pdf format.
- 2. Zoom and find the maxima.
-
- 3. Bring it back to initial position.
-
-
-Please, pause the video here. Do the exercise and then continue.
-
-
-
-
-
-
-
-
-
-{{{ Summary Slide }}}
-
-In this tutorial we have looked at
-
-1. Starting Ipython with pylab
-
-2. Using linspace function to create `num` equaly spaced points in a region.
-
-3. Finding length of sequnces using len.
-
-4. Plotting mathematical functions using plot.
-
-4. Clearing drawing area using clf
-
-5. Using the UI of plot for studying it better . Using functionalities like save , zoom and moving the plots on x and y axis
-
-
- {{{ Show the "sponsored by FOSSEE" slide }}}
-
-
-
-This tutorial was created as a part of FOSSEE project, NME ICT, MHRD India
-
-
-
- Hope you have enjoyed and found it useful.
-
- Thankyou
-
-
-
-Author : Amit Sethi
-Internal Reviewer :
-Internal Reviewer 2 :