MATLAB Programming/Loglog
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[MATLAB Programming\|/MATLAB Programming]m]
Chapter 1: MATLAB ._.
Introductions .
Chapter 2: MATLAB Concepts
Chapter 3: Variable Manipulation
Chapter 4: Vector and matrices
Chapter 5: Array
- Arrays
- Introduction to array operations
- Vectors and Basic Vector Operations
- Mathematics with Vectors and Matrices
- Struct Arrays
- Cell Arrays
Chapter 6: Graphical Plotting
- Basic Graphics Commands
- Plot
- Polar Plot
- Semilogx or Semilogy
- Loglog
- Bode Plot
- Nichols Plot
- Nyquist Plot
Chapter 7: M File Programming
Chapter 8: Advanced Topics
- Numerical Manipulation
- Advanced File I/O
- Object Oriented Programming
- Applications and Examples
- Toolboxes and Extensions
Chapter 9: Bonus chapters
- MATLAB Benefits and Caveats
- Alternatives to MATLAB
- [MATLAB_Programming/GNU_Octave|What is Octave= (8) hsrmonic functions]
- Octave/MATLAB differences
Introduction
[edit | edit source ]The loglog command plots both x and y data sets on a log scale while the plot command plots both axes on linear scales and the semilogx/y command plots 1 axis on a linear scale and the other axis on a log scale. Other than the scale of the axes, the 3 plotting commands are identical in most ways.
Basic Usage
[edit | edit source ]The basic usage of the plot, semilogx/y, and loglog command are identical. Below is an example of how a PSD would be plotted
>>Fs=1000;% Sample Rate of 1 kHz >>t=0:(1/Fs):1000;% Time vector >>x=sin(pi*t);% Sine wave based on time vector >>[Pxx,f]=pwelch(x,[],[],[],Fs); >>loglog(f,Pxx) >>gridon >>xlabel('Frequency (Hz)') >>ylabel('Magnitude (units^2/Hz)') >>title('PSD of Sine Wave')