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# R commands      STAT588/BIOL588
# Lab 1  2023     University of South Carolina
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# This file contains the R commands for the lab.
#
# Lines beginning with the symbol '#' are comments in R.  All other
# lines contain code.
#
# In R for Windows, you may wish to open this file from the menu bar
# (File:Display file); you can then copy commands into the command
# window.  (Use the mouse to highlight one or more lines; then
# right-click and select "Paste to console".)
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#### objects
# ax^2+bx+c=0
# x^2 + x -1=0

a<-1
b<-1
c<--1

str(a)

### workspace 
ls()
x
(-b+sqrt(b^2-4*a*c))/(2*a)
(-b-sqrt(b^2-4*a*c))/(2*a)

###### functions 
exp(1)
log(exp(1))
help(log) ## default value 
args(log)
log(8, base=3)
log(x=8, base=3)
log(8,2)


### exception
2^3
help("+")
?"+"

#### data object 
data()
### 
pi
Inf

#### variable name 

solution_1<-(-b+sqrt(b^2-4*a*c))/(2*a)
solution_1<-(-b-sqrt(b^2-4*a*c))/(2*a)

#### create and save a script 
#### comment