# In the csv data, you have a variable called BPM. From that variab...

## Question

In the csv data, you have a variable called BPM.
From that variable, we want to calculate and create another variable called RR.
The formula for RR is (60/BPM) * 1000.
So, now we have two variables: BPM and RR.
Then we want to create a third variable that is called RMSSD.
RMSSD is the square root of (RR 1 – RR2)² + (RR2-RR3)² + (RR3-RR4)² + …..until the last RR in the dataset.
Everything has to be done in R.

## Solution Preview

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# Creating the new variable RR
hr_data\$RR <- (60/hr_data\$BPM)*1000
##       BPM       RR
## 1 45.81423 1309.637
## 2 45.77602 1310.730
## 3 45.75692 1311.277
## 4 45.77602 1310.730
## 5 45.79513 1310.183
## 6 45.79513 1310.183
# Creating RMSSD
data_len <- nrow(hr_data)

RMSSD_calc <- 0
for (i in 1:data_len){...

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