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(What does "Endorsed by" mean?)Any result you wish to keep for a while may be assigned to a variable
other than ans:
≫ x = pi/7
≫ cos(x)
≫ y = sin(x)^2+cos(x)^2;
≫ yA semicolon (;) at the end of the line suppresses printing of the result, as when
we calculated
MATLAB supports the dynamic creation of variables. You can create
your own variables by just assigning a value to a variable. For example, type x = 3.5+4.2. Then the real variable x contains the value 7.7. Variable names
must start with an alphabetical character and be less than nineteen characters
long. If you type x = -3*4.0, the content 7.7 is replaced by the value -12.
Some commands allow you to keep track of all the variables that you have
already created in your session. Type who or whos to get the list and names
of the variables currently in memory (whos gives more information than who).
To clear all the variables, type in clear. To clear a single variable (or several)
from the list, follow the command clear by the name of the variable you want
to delete or by a list of variable names separated by spaces. Try it now.
MATLAB is case sensitive. In other words, casesen, which toggles the sensitivity. The command casesen on enforces case sensitivity, and casesen off cancels it.
If one line is not enough to enter your command, then finish the first line with two dots
≫ theta = pi/7; x = cos(theta); y = sin(theta);
≫ x,yto first compute theta,cos(theta), and sin(theta) and then to print
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This work is licensed by Louis Scharf under a Creative Commons Attribution License (CC-BY 3.0), and is an Open Educational Resource.
Last edited by Daniel Williamson on Sep 16, 2009 12:44 pm GMT-5.
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