General Computer Science General Computer Science for Engineersfor Engineers
CISC 106CISC 106Lecture 02Lecture 02
James AtlasComputer and Information Sciences
CPU
Disk
Memory
How does our program work?
1. ~~~~~~~~~~2. ~~~~~~~~~~3. ~~~~~~~~~~4. ~~~~~~~~~~5. ~~~~~~~~~~6. ~~~~~~~~~~7. ~~~~~~~~~~8. ~~~~~~~~~~
. . .
x86 instructions
Our Program in Memory
VariablesVariablesvar = expression
x = 2 * 2comment = ‘This is a string’area = circleArea(5)
What type of data is stored in each variable?
How do computers store data?Binary
◦Billions of tiny logic gates representing ON and OFF (1 and 0)
Video◦ http://www.youtube.com/watch?
v=b6vHZ95XDwU
Data Types in MatlabFloating point number by default
◦“double” precision = 64-bits of memory
Operations on Data Types5.5single(5.5)int8(5)int8(500) ?int8(‘c’) ?char(98) ?
>> x = 5.5>> whos x
ExpressionsData and Operator
◦2 + 2◦circleArea(5)
ExpressionsData and Operator
◦2 + 2◦circleArea(5)
Nested Expressions◦circleArea(circleArea(5 + 2) +
circleArea(3))
ExpressionsData and Operator
◦2 + 2◦circleArea(5)
Nested Expressions◦circleArea(circleArea(5 + 2) +
circleArea(3))
Expressions produce a value
Lab00 (pre-lab) / Lab01
Using Matlab Remotely (text)ssh [email protected]
◦requires an ssh program such as PuTTY◦see course website for installation details
at prompt type:matlab -nodesktop
Using Matlab Remotely (GUI)Mac users:
◦ You already have an X-Windows environmentPC users:
◦ You must setup Cygwin-X◦ Download Cygwin setup.exe from:
http://www.cygwin.com/◦ Run setup.exe and select additional packages
for: xauth xinit openssh
Running Matlab RemotelyOnce the X-Windows environment is
setup, open a terminal window and login to strauss:◦ssh -YC [email protected]
Now start Matlab:◦matlab &
What does the & do?
