summaryrefslogtreecommitdiffhomepage
diff options
context:
space:
mode:
-rw-r--r--matlab.html.markdown18
1 files changed, 17 insertions, 1 deletions
diff --git a/matlab.html.markdown b/matlab.html.markdown
index ad42d9a9..9d78978e 100644
--- a/matlab.html.markdown
+++ b/matlab.html.markdown
@@ -123,6 +123,7 @@ x(2:end) % ans = 32 53 7 1
x = [4; 32; 53; 7; 1] % Column vector
x = [1:10] % x = 1 2 3 4 5 6 7 8 9 10
+x = [1:2:10] % Increment by 2, i.e. x = 1 3 5 7 9
% Matrices
A = [1 2 3; 4 5 6; 7 8 9]
@@ -205,6 +206,8 @@ transpose(A) % Transpose the matrix, which is the same as:
A one
ctranspose(A) % Hermitian transpose the matrix
% (the transpose, followed by taking complex conjugate of each element)
+A' % Concise version of complex transpose
+A.' % Concise version of transpose (without taking complex conjugate)
@@ -254,6 +257,8 @@ axis equal % Set aspect ratio so data units are the same in every direction
scatter(x, y); % Scatter-plot
hist(x); % Histogram
+stem(x); % Plot values as stems, useful for displaying discrete data
+bar(x); % Plot bar graph
z = sin(x);
plot3(x,y,z); % 3D line plot
@@ -400,7 +405,7 @@ exp(x)
sqrt(x)
log(x)
log10(x)
-abs(x)
+abs(x) %If x is complex, returns magnitude
min(x)
max(x)
ceil(x)
@@ -411,6 +416,14 @@ rand % Uniformly distributed pseudorandom numbers
randi % Uniformly distributed pseudorandom integers
randn % Normally distributed pseudorandom numbers
+%Complex math operations
+abs(x) % Magnitude of complex variable x
+phase(x) % Phase (or angle) of complex variable x
+real(x) % Returns the real part of x (i.e returns a if x = a +jb)
+imag(x) % Returns the imaginary part of x (i.e returns b if x = a+jb)
+conj(x) % Returns the complex conjugate
+
+
% Common constants
pi
NaN
@@ -465,6 +478,9 @@ median % median value
mean % mean value
std % standard deviation
perms(x) % list all permutations of elements of x
+find(x) % Finds all non-zero elements of x and returns their indexes, can use comparison operators,
+ % i.e. find( x == 3 ) returns indexes of elements that are equal to 3
+ % i.e. find( x >= 3 ) returns indexes of elements greater than or equal to 3
% Classes