# Matlab

rename
anandengg's
version from
2018-03-24 19:35

## Section

Question | Answer |
---|---|

clc | Clears command window. |

clear | Removes variables from memory. |

exist | Checks for existence of file or variable. |

global | Declares variables to be global. |

help | Searches for a help topic. |

lookfor | Searches help entries for a keyword. |

quit | Stops MATLAB. |

who | Lists current variables. |

whos | Lists current variables (long display). |

cd | Changes current directory. |

date | Displays current date. |

delete | Deletes a file. |

diary | Switches on/off diary file recording. |

dir | Lists all files in current directory. |

load | Loads workspace variables from a file. |

path | Displays search path. |

pwd | Displays current directory. |

save | Saves workspace variables in a file. |

type | Displays contents of a file. |

what | Lists all MATLAB files in the current directory. |

wklread | Reads .wk1 spreadsheet file. |

Question | Answer |
---|---|

%s | Format as a string. |

%d | Format as an integer. |

%f | Format as a floating point value. |

%e | Format as a floating point value in scientific notation. |

%g | Format in the most compact form: %f or %e. |

\n | Insert a new line in the output string. |

\t | Insert a tab in the output string. |

format short | Four decimal digits (default). |

format long | 16 decimal digits. |

format short e | Five digits plus exponent. |

format long e | 16 digits plus exponents. |

format bank | Two decimal digits. |

format + | Positive, negative, or zero. |

format rat | Rational approximation. |

format compact | Suppresses some line feeds. |

format loose | Resets to less compact display mode. |

Question | Answer |
---|---|

cat | Concatenates arrays. |

find | Finds indices of nonzero elements. |

length | Computes number of elements. |

linspace | Creates regularly spaced vector. |

logspace | Creates logarithmically spaced vector. |

max | Returns largest element. |

min | Returns smallest element. |

Question | Answer |
---|---|

prod | Product of each column. |

reshape | Changes size. |

size | Computes array size. |

sort | Sorts each column. |

sum | Sums each column. |

eye | Creates an identity matrix. |

ones | Creates an array of ones. |

zeros | Creates an array of zeros. |

cross | Computes matrix cross products. |

dot | Computes matrix dot products. |

det | Computes determinant of an array. |

inv | Computes inverse of a matrix. |

pinv | Computes pseudoinverse of a matrix. |

rank | Computes rank of a matrix. |

rref | Computes reduced row echelon form. |

cell | Creates cell array. |

celldisp | Displays cell array. |

cellplot | Displays graphical representation of cell array. |

num2cell | Converts numeric array to cell array. |

deal | Matches input and output lists. |

iscell | Identifies cell array. |

Question | Answer |
---|---|

axis | Sets axis limits. |

fplot | Intelligent plotting of functions. |

grid | Displays gridlines. |

plot | Generates xy plot. |

Prints plot or saves plot to a file. | |

title | Puts text at top of plot. |

xlabel | Adds text label to x-axis. |

ylabel | Adds text label to y-axis. |

axes | Creates axes objects. |

close | Closes the current plot. |

close all | Closes all plots. |

figure | Opens a new figure window. |

gtext | Enables label placement by mouse. |

hold | Freezes current plot. |

legend | Legend placement by mouse. |

refresh | Redraws current figure window. |

set | Specifies properties of objects such as axes. |

subplot | Creates plots in subwindows. |

text | Places string in figure. |

bar | Creates bar chart. |

loglog | Creates log-log plot. |

polar | Creates polar plot. |

semilogx | Creates semilog plot. (logarithmic abscissa). |

semilogy | Creates semilog plot. (logarithmic ordinate). |

stairs | Creates stairs plot. |

stem | Creates stem plot. |

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