UNLV UCLA Brochure - UCLA Extension Business, Management ...
An Introduction to MATLAB - UCLA · Variables to result of expression...
Transcript of An Introduction to MATLAB - UCLA · Variables to result of expression...
![Page 2: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/2.jpg)
� High%level%language%� Programing%language%and%development%environment%� Built4in%development%tools%� Numerical%manipulation%� Plotting%of%functions%and%data%� Implement%algorithms%� Create%models%and%applications%� Many%built%in%functions%� Interface%with%other%languages%� Create%graphical%interfaces%
![Page 3: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/3.jpg)
The MATLAB Environment
![Page 4: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/4.jpg)
Current Folder
![Page 5: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/5.jpg)
Command Window >>
![Page 6: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/6.jpg)
Workspace
![Page 7: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/7.jpg)
Editor
![Page 8: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/8.jpg)
Command Window Basics
![Page 9: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/9.jpg)
Common Arithmetic Operators
+ %Addition%4 %Subtraction%%* %Multiplication%/ %Division%^ %Exponential%() %Order%operations%%
![Page 10: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/10.jpg)
Semicolons in MATLAB
Suppress%the%output%from%a%MATLAB%expression%
![Page 11: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/11.jpg)
Comments %
Suppress%the%output%from%a%MATLAB%expression%
![Page 12: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/12.jpg)
Variables
Variable%name%=%variable%value%%%%%%%Be%careful%of%i,j%
![Page 13: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/13.jpg)
Variables 2
MATLAB%is%CASE%SENSITIVE%%%%%%%
![Page 14: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/14.jpg)
Close%MATLAB%%Reopen%MATLAB%
![Page 15: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/15.jpg)
Initially%Workspace%is%empty%
![Page 16: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/16.jpg)
Load%your%workspace%
![Page 17: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/17.jpg)
Variables to result of expression
If%an%expression%is%not%stored%as%a%variable%it%will%be%stores%as%‘ans’%
![Page 18: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/18.jpg)
Multiple assignments and ‘who’
![Page 19: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/19.jpg)
whos
![Page 20: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/20.jpg)
format
‘format%short’%%to%get%back%to%normal%
![Page 21: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/21.jpg)
Numbers are actually 1x1 Matrices
![Page 22: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/22.jpg)
Operations apply to matrices
![Page 23: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/23.jpg)
Operations apply to matrices
![Page 24: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/24.jpg)
Put . before an operator to make it
element-wise
disp(variable)%displays%the%contents%of%a%variable%
![Page 25: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/25.jpg)
fprintf – print something to command window
%s %Format%as%a%string.%%d %Format%as%an%integer.%%f %Format%as%a%floating%point%value.%%e %Format%as%a%floating%point%value%in%scientific%notation.%%g %Format%in%the%most%compact%form:%%f%or%%e.%\n %Insert%a%new%line%in%the%output%string.%\t %Insert%a%tab%in%the%output%string.%
![Page 26: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/26.jpg)
Concatenating matrices
![Page 27: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/27.jpg)
Concatenating matrices
Why%is%this%1,1?%
![Page 28: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/28.jpg)
Many Functions work on columns
![Page 29: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/29.jpg)
� 3%Ways%of%running%code%� Command%Window%� Scripts%� Functions%
Working with m-files
m"files'
![Page 30: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/30.jpg)
New Script
![Page 31: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/31.jpg)
Our First Script
![Page 32: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/32.jpg)
Scripts can create variables in the workspace
![Page 33: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/33.jpg)
Data Types
� Type%declarations%are%not%necessary%in%MATLAB%
� MATLAB%automatically%decides%data%type%
![Page 34: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/34.jpg)
Data Types
single%4%single%precision%numerical%data%double %%4%double%precision%numerical%data%logical'"'logical%values%of%1%or%0,%represent%true%and%false%respectively%char''"'character%data%(strings%are%stored%as%vector%of%characters)%cell'array%4%array%of%indexed%cells,%each%capable%of%storing%an%array%of%a%different%dimension%and%data%type%structure%4%named%fields%capable%of%storing%an%array%of%a%different%dimension%and%data%type%function'handle%4%pointer%to%a%function%user'classes'"'objects%constructed%from%a%user4defined%class%Int8'uint8'int16'uint16'int32'uint32'int64'uint64'–%don’t%worry%about%these''
![Page 35: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/35.jpg)
Data Types
![Page 36: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/36.jpg)
Testing Data Types
![Page 37: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/37.jpg)
Relational Operators
< %Less%than%>= %Less%than%or%equal%to%> %Greater%than%>= %Greater%than%or%equal%to%== %Equal%to%~= %Not%equal%to%%%%%
Useful%for%if%statements!%
![Page 38: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/38.jpg)
If Statement
Never'run'
![Page 39: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/39.jpg)
If else Statement
![Page 40: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/40.jpg)
If elseif Statement
![Page 41: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/41.jpg)
Nested if Statement
![Page 42: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/42.jpg)
For loops
![Page 43: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/43.jpg)
Combining What We’ve Learned
Write%a%script'that%takes%a%list%of%gene%names%and%gene%expression%values%and%outputs%only%those%gene%names%over%a%threshold.%%PSUEDO%CODE:%For%each%gene%in%a%list:%
%if%its%expression%value%is%over%the%threshold%% %print%the%gene%name%and%the%expression%value%
![Page 44: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/44.jpg)
Combining What We’ve Learned
PSUEDO%CODE:%For%each%gene%in%a%list:%
%if%its%expression%value%is%over%the%threshold%% %print%the%gene%name%and%the%expression%value%
![Page 45: An Introduction to MATLAB - UCLA · Variables to result of expression If%an%expression%is%not%stored%as%a%variable%it%will%be%stores% as%‘ans’%](https://reader034.fdocuments.net/reader034/viewer/2022042307/5ed33e0a0435ca6f1051e9de/html5/thumbnails/45.jpg)
Combining What We’ve Learned