Objective Questions

-------------------

.. A mininum of 8 questions here (along with answers)

1. What argument can be used with savefig to increase the resolution

   of the plot while saving a plot.

   a. fname

   #. transparency

   #. dpi

   #. format

Answer: dpi

2. The fname argument of savefig has to be always absolute path.

   a. True

   #. False

Answer: False

3. You are right now in the directory `/home/fossee`, from the

   following which one is the correct one in-order to save the plot as

   svg with the filename `plot` to the directory `/home/fossee/sine/`

   a. savefig('/sine/plot.svg')

   #. savefig('sine/plot.svg')

   #. savefig('home/fossee/sine/plot.svg')

   #. All of these

   #. None of the above

Answer: savefig('sine/plot.svg')

4. Which is the best image format to be used with Latex documents

   which savefig supports?

   a. SVG - Scalable Vector Graphics

   #. EPS - Encapsulated Post Script

   #. PS - Post Script

   #. PNG - Portable Network Graphics

   #. None of the above

Answer: EPS - Encapsulated Post Script

5. ``savefig('sine.png')`` saves the plot in,

   a. The root directory ``/`` (on GNU/Linux, Unix based systems)

      ``c:\`` (on windows).

   #. Will result in an error as full path is not supplied.

   #. The current working directory.

   #. Predefined directory like ``/documents``.

Answer: The current working directory.

6. Study the following code and tell what will happen,

   ::

      savefig('cosine.png',facecolor='blue')

   a. Will generate an error as plot statements are missing

   #. Will generate an error as full path is not specified

   #. Create a file ``cosine.png`` with blue background at the current

      working directory.

   #. Create a file ``cosine.png`` with blue background at a

      predefined directory like ``/documents``.

Answer: Create a file ``cosine.png`` with blue background at the

	current working directory.

7. How to save the below plot as ``sine_green_border.png`` with green

   color border/edge in the current working directory.  The plot is given

   as,

   ::

	x = linspace(-5*pi,5*pi,200)

	plot(x,sin(x),linewidth=2)

	legend(['sin(x)'])

   a. ``savefig('sine_green_border.png',bordercolor='green')``

   #. ``savefig('sine_green_border.png',facecolor='green')``

   #. ``savefig('sine_green_border.png',edgecolor='green')``

   #. ``savefig('/sine_green_border.png',bordercolor='green')``

Answer: savefig('sine_green_border.png',edgecolor='green')

8. Given the below code snippet, what does it do?

   ::

	x = linspace(-5*pi,5*pi,200)

	plot(x,sin(x),linewidth=2)

	legend(['sin(x)'])

    	savefig('sine.png',format='pdf',papertype='a4')

   a. Save the sine plot in file sine.png as a pdf file in page-size

      A4 and saves it into the current working directory

   #. Save the sine plot in file sine.png.pdf in page-size A4 into the

      current working directory.

   #. Save the sine plot in a file sine.png in png format with

      page-size A4 in the current working directory overriding the

      format argument

   #. Error in filename and format mismatch.

Answer: Save the sine plot in file sine.png as a pdf file in page-size

	A4 and saves it into the current working directory

Larger Questions

----------------

.. A minimum of 2 questions here (along with answers)

1. Plot a cosine plot from -2pi to 2pi in green color taking 300

   points. Title the plot as 'Cosine plot' and the legend plot with

   'cos(x)'. And save the plot as a pdf file with the filename

   cosine_plot.

2. Plot tan(x) where x varies from -4pi to 4pi in red color taking 600

   points. Title the plot as 'Tan plot' and the legend plot with

   'tan(x)'. And save the plot as a svg file with the filename

   tangent_plot.