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-rw-r--r--matlab.html.markdown56
1 files changed, 38 insertions, 18 deletions
diff --git a/matlab.html.markdown b/matlab.html.markdown
index 9dae8ef2..2b9077d5 100644
--- a/matlab.html.markdown
+++ b/matlab.html.markdown
@@ -15,10 +15,12 @@ If you have any feedback please feel free to reach me at
```matlab
% Comments start with a percent sign.
-%{ Multi line comments look
+%{
+Multi line comments look
something
like
-this %}
+this
+%}
% commands can span multiple lines, using '...':
a = 1 + 2 + ...
@@ -40,36 +42,41 @@ ctrl-c % Abort current computation
edit('myfunction.m') % Open function/script in editor
type('myfunction.m') % Print the source of function/script to Command Window
-profile viewer % Open profiler
+profile on % turns on the code profiler
+profile of % turns off the code profiler
+profile viewer % Open profiler
-help command % Displays documentation for command in Command Window
-doc command % Displays documentation for command in Help Window
-lookfor command % Searches for a given command
+help command % Displays documentation for command in Command Window
+doc command % Displays documentation for command in Help Window
+lookfor command % Searches for command in the first commented line of all functions
+lookfor command -all % searches for command in all functions
% Output formatting
-format short % 4 decimals in a floating number
-format long % 15 decimals
-format bank % only two digits after decimal point - for financial calculations
-fprintf
+format short % 4 decimals in a floating number
+format long % 15 decimals
+format bank % only two digits after decimal point - for financial calculations
+fprintf('text') % print "text" to the screen
+disp('text') % print "text" to the screen
% Variables & Expressions
-myVariable = 4 % Notice Workspace pane shows newly created variable
+myVariable = 4 % Notice Workspace pane shows newly created variable
myVariable = 4; % Semi colon suppresses output to the Command Window
-4 + 6 % ans = 10
-8 * myVariable % ans = 32
-2 ^ 3 % ans = 8
+4 + 6 % ans = 10
+8 * myVariable % ans = 32
+2 ^ 3 % ans = 8
a = 2; b = 3;
c = exp(a)*sin(pi/2) % c = 7.3891
% Calling functions can be done in either of two ways:
% Standard function syntax:
-load('myFile.mat', 'y')
+load('myFile.mat', 'y') % arguments within parantheses, spererated by commas
% Command syntax:
-load myFile.mat y % no parentheses, and spaces instead of commas
+load myFile.mat y % no parentheses, and spaces instead of commas
% Note the lack of quote marks in command form: inputs are always passed as
% literal text - cannot pass variable values. Also, can't receive output:
-[V,D] = eig(A) % this has no equivalent in command form
+[V,D] = eig(A); % this has no equivalent in command form
+[~,D] = eig(A); % if you only want D and not V
@@ -100,6 +107,10 @@ a = {'one', 'two', 'three'}
a(1) % ans = 'one' - returns a cell
char(a(1)) % ans = one - returns a string
+% Structures
+A.b = {'one','two'};
+A.c = [1 2];
+A.d.e = false;
% Vectors
x = [4 32 53 7 1]
@@ -160,6 +171,10 @@ A(1,:) % All columns in row 1
% 4 5 42
% 7 8 9
+% this is the same as
+vertcat(A,A);
+
+
[A , A] % Concatenation of matrices (horizontally)
%ans =
@@ -168,6 +183,8 @@ A(1,:) % All columns in row 1
% 4 5 42 4 5 42
% 7 8 9 7 8 9
+% this is the same as
+horzcat(A,A);
A(:, [3 1 2]) % Rearrange the columns of original matrix
@@ -180,10 +197,13 @@ A(:, [3 1 2]) % Rearrange the columns of original matrix
size(A) % ans = 3 3
A(1, :) =[] % Delete the first row of the matrix
+A(:, 1) =[] % Delete the first column of the matrix
+transpose(A) % Transpose the matrix, which is the same as:
+A'
ctranspose(A) % Hermitian transpose the matrix
% (the transpose, followed by taking complex conjugate of each element)
-transpose(A) % Transpose the matrix, without taking complex conjugate
+