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- %% Change Octave prompt
- PS1('>> ');
- %% Change working directory in windows example:
- cd 'c:/path/to/desired/directory name'
- %% Note that it uses normal slashes and does not use escape characters for the empty spaces.
- %% elementary operations
- 5+6
- 3-2
- 5*8
- 1/2
- 2^6
- 1 == 2 % false
- 1 ~= 2 % true. note, not "!="
- 1 && 0
- 1 || 0
- xor(1,0)
- %% variable assignment
- a = 3; % semicolon suppresses output
- b = 'hi';
- c = 3>=1;
- % Displaying them:
- a = pi
- disp(a)
- disp(sprintf('2 decimals: %0.2f', a))
- disp(sprintf('6 decimals: %0.6f', a))
- format long
- a
- format short
- a
- %% vectors and matrices
- A = [1 2; 3 4; 5 6]
- v = [1 2 3]
- v = [1; 2; 3]
- v = 1:0.1:2 % from 1 to 2, with stepsize of 0.1. Useful for plot axes
- v = 1:6 % from 1 to 6, assumes stepsize of 1 (row vector)
- C = 2*ones(2,3) % same as C = [2 2 2; 2 2 2]
- w = ones(1,3) % 1x3 vector of ones
- w = zeros(1,3)
- w = rand(1,3) % drawn from a uniform distribution
- w = randn(1,3)% drawn from a normal distribution (mean=0, var=1)
- w = -6 + sqrt(10)*(randn(1,10000)); % (mean = -6, var = 10) - note: add the semicolon
- hist(w) % plot histogram using 10 bins (default)
- hist(w,50) % plot histogram using 50 bins
- % note: if hist() crashes, try "graphics_toolkit('gnu_plot')"
- I = eye(4) % 4x4 identity matrix
- % help function
- help eye
- help rand
- help help
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