MATLAB FAQ

Frequently asked questions in comp.soft-sys.matlab

Recent Changes:

• (+) Q3.12: How can I process a sequence of files?

Table of Contents

• Introduction
• 1 Introduction, Policy, Credits
  • Q1.1: What is MATLAB?
  • Q1.2: What is this newsgroup about?
  • Q1.3: Where can I find an archive of comp.soft-sys.matlab?
  • Q1.4: What other software packages exist to do similar work?
  • Q1.5: What is the FAQ editorial policy?
  • Q1.6: Who maintains this FAQ?
  • Q1.7: Contributors
• 2 Basics
  • Q2.1: Why does MATLAB only calculate to 4 significant digits?
  • Q2.2: Why does the transpose operator take the complex conjugate?
  • Q2.3: How can I set all NaN's to 0?
  • Q2.4: How can I make MATLAB use the full window width for displaying matrices?
  • Q2.5: How do I comment out a large block of code?
  • Q2.6: How do I save default settings across sessions?
  • Q2.7: How can I find local maxima in a vector array?
  • Q2.8: Why is 6*i not complex in my program?
  • Q2.9: How can I modify the MATLAB path?
• 3 Programming
  • Q3.1: Can I read a text file with a certain format?
  • Q3.2: Why are global variables bad?
  • Q3.3: What about this logical array business?
  • Q3.4: Huge memory waste using array of structs?
  • Q3.5: Why is my MEX file crashing?
  • Q3.6: How can I create variables A1, A2,...,A10 in a loop?
  • Q3.7: Do boolean operators short-circuit?
  • Q3.8: How do I fix "Out of Memory" problems?
  • Q3.9: How do I dynamically generate a filename for SAVE?
  • Q3.10: What's the difference between M-files, Pcode, and MEX files?
  • Q3.11: Can MATLAB pass by reference?
  • Q3.12: How can I process a sequence of files?
• 4 Graphics
  • Q4.1: How do I adjust the fontsize of a ticklabel?
  • Q4.2: Can I create a pi/sigma/superscript in my ticklabels?
  • Q4.3: Can I open multiple files using uigetfile?
  • Q4.4: I want to use a scrollbar to scroll my edit boxes/buttons
  • Q4.5: How can I rotate ticklabels?
  • Q4.6: How can I display data in a grid like Excel?
  • Q4.7: How can I write a title or text with multiple lines?
  • Q4.8: How can I use a common color scale among several images?
  • Q4.9: How can I set default handle graphics properties?
  • Q4.10: How can I modify the default background color used for histograms?
  • Q4.11: How can I draw more than two lines with plotyy?
  • Q4.12: Is there a command available for plotting an arrow on a graph?
  • Q4.13: Why does movie(M,1) display the movie M twice?
  • Q4.14: How can I set the focus in my GUI?
  • Q4.15: How can I add text labels to data points?
• 5 Math/Algorithms
  • Q5.1: Why is 0.3-0.2-0.1 not equal to zero (or similar)?
  • Q5.2: How does the backslash operator work? What does it do?
  • Q5.3: How does one compute a factorial?
  • Q5.4: How can one accurately compute ratios of factorials?
  • Q5.5: How can I fit a circle to a set of XY data?
  • Q5.6: Why does MATLAB return an complex number for (-8)^(1/3)
  • Q5.7: Can I compute the DFT of an irregularly-sampled signal?
  • Q5.8: How can I efficiently do row-wise vector-matrix multiplication?
• 6 Installation, Crashes, Platform-Specific Issues
  • Q6.1: MATLAB 5.3 won't run on my linux system.
  • Q6.2: Why do I get a segfault after compiling correct MEX files under linux?
  • Q6.3: Why does MATLAB 6.0 crash on my Pentium 4?
  • Q6.4: How can I make MATLAB 6.0 (R12) open without the GUI?
  • Q6.5: Why does MATLAB 6.0 crash under Redhat 7.0?
  • Q6.6: Why can't I type into the command window?
  • Q6.7: What happened to MATLAB for the Macintosh?
  • Q6.8: How do I release a MATLAB license?
  • Q6.9: Is MATLAB optimized for the Pentium IV?
  • Q6.10: Why doesn't Ctrl-C interrupt execution of my m-file?
• 7 Toolboxes, Software Archives, Books, and Other Resources
  • Q7.1: Where can I find archives of MATLAB software?
  • Q7.2: Where can I find a package to perform a specific task?
  • Q7.3: What textbook would you recommend for learning Matlab?
  • Q7.4: Where can I find MATLAB Style Guides or Coding Standards?
• 8 Simulink
  • Q8.1: How do I insert a Simulink model into an MS Office Document?
• 9 Miscellaneous
  • Q9.1: Why does MATLAB 6.0 (R12) take so much memory?
  • Q9.2: Can I use MATLAB to interface to an RS232 serial port?
  • Q9.3: I've seen system_dependent on the newsgroup before. What does it do?
  • Q9.4: Why does bench run so much slower in MATLAB 6.x than in 5.x?
  • Q9.5: What is vectorization?
  • Q9.6: What is Acklamization?
  • Q9.7: Why does MATLAB needlessly access the floppy drive?
  • Q9.8: How do I run MATLAB in batch mode?

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