Class 1

Car Data Analysis

We are working with a car dataset

Car data load

print(cars)

Car statistics

summary(car_data)

     speed           dist       
 Min.   : 4.0   Min.   :  2.00  
 1st Qu.:12.0   1st Qu.: 26.00  
 Median :15.0   Median : 36.00  
 Mean   :15.4   Mean   : 42.98  
 3rd Qu.:19.0   3rd Qu.: 56.00  
 Max.   :25.0   Max.   :120.00  

plot(cars)

Arithmetic operations

x = 10
y = 5

print(x+y)

[1] 15

print(x-y)

[1] 5

print(x*y)

[1] 50

print(x/y)

[1] 2

print(x^y)

[1] 1e+05

print(2^3)

[1] 8

print(x %% y)

[1] 0

print(10 %% 3)

[1] 1

print( ((x+y)*5) - 20 )

[1] 55

String

Concatenation (Combine)

seq1 = "This is a text"
seq2 = " this will be added after"
merge_seq = paste(seq1, seq2, sep="")
print(merge_seq)

[1] "This is a text this will be added after"

Substring

gene_seq = "AGGGAGTTCTTCCAGCTA"
gene_segmenet = substr(gene_seq, 4, 90)
print(gene_segmenet)

[1] "GAGTTCTTCCAGCTA"

Length

gene_seq = "AGGGAGTTCTTCCAGCTA"
length_seq = nchar(gene_seq)
print(length_seq)

[1] 18

gene_seq1 = "AGGGAGTTCTTCCAGC"
gene_seq2 = "AGGGAGTTCTTCCAGCTAqs"
gene_seq3 = "AGGGAGTTCTTCCAGCTAasdasd"

# loop