Graduationwoot

Dragon Notes

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  UNDER CONSTRUCTION

MATLAB vs. R



Arrays, Vectors, Matrices

MATLABR
>> arr = zeros(2,3)
>> vec = [1 4 9 16]
>> mtx = [1 2 3; 4 5 6]

>> mtx(2,3), mtx(1,:)
>> size(mtx,1), size(mtx,2)
>> {0,rand(2),'Greets',{'Cell','ception'}}
> arr = array(0, dim = c(2,3)) 

# 'dim =' omittable

> vec = c(1,4,9,16) > mtx = array(c(c(1,2,3),c(4,5,6)), c(2,3))

# or,

mtx = matrix(c(1,2,3,4,5,6), 2, 3, 1)

# '1' arranges by row

> mtx[2,3], mtx[1,] > nrow(mtx), ncol(mtx) > data.frame(c1=0,c2=runif(2),c3='Greets',c4=c('Cell','ception'))

% not exactly same as MATLAB's; execute both to compare


Plots

MATLABR
>> t = 0:.1:10;
   y = sin(t);
   plot(t,y)
   

'green' / 'g' LineWidth Marker = 'x'

>> xlabel, ylabel
> t = seq(0,10,.1)
  y = sin(t)
  plot(t,y,'l') 

# default = scatter

col = 'green' lwd pch = 'x'; try plot(1:20,1:20,pch =1:20)

> xlab, ylab

General

MATLABR
>> clc
>> clear all
>> clear x
>> keepvars = {'x','y'}
   clearvars('-except', keepvars{:});
>> pwd
>> cd(dir)  
> [Ctrl] + [L]  

# key presses

> rm(list=ls()) > rm(x) > keepvars = c('x','y') rm(list=setdiff(ls(), keepvars)) > getwd() > setwd(dir)

# use '/' instead of '\'





Dragon Notes,   Est. 2018     About

By OverLordGoldDragon