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Mathematica 3.0 Notebooks
Every Mathematica "notebook," or file, is separated into a series
of sections. These sections are shown by the blue brackets on the far right
of the window. By highlighting the appropriate blue bracket, an entire
section can be executed at a time. You can highlight a large section that
includes many smaller subsections, and execute, copy, or delete them all
by deleting the large section.
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Let's say we want to delete
the first calculation, the integral. Instead of selecting each little part,
the entire calculation can be selected and deleted all at once. Looking
at the blue brackets on the right, you will notice that there are three
different columns, or levels, or brackets. The second bracket down in the
middle column corresponds to the entire calculation we want to delete,
the integral.
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Click on the second bracket down in the middle column. This will highlight
and select the bracket corresponding to the integration.
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Now that the entire calculation
is selected, it can be deleted by pressing "delete."
Note: Make sure you have to correct brackets selected before
you delete anything! You could inadvertently delete a large portion of
your work!
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Once you have a function, you may want to plot it. A plot is very useful
if you want to get an overall picture of how a function or functions behave.
You can make a simple 2-Dimensional plot by using the command:
Plot[f(x),{x,min range,max range}]
In this example, the command
y=Integrate[x^2,x] was used to set
the variable "y" equal to the integral of the square of "x." The result
was plotted using the "Plot" command shown above.
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