Predict weight when height is given using linear regression in R

Question

Suppose I have heights of a few people and based on that I need to predict their weights. is that possible in R?

Answer 1

You can the concept of linear regression for this purpose. Its a statistic tool used to build relationship between to variables called predictor variable which is heights of people in your case and response variable which is weight in this case. Follow these steps:

• Gather heights and weights like atleast a few observations.
• use the lm() function to create the relationship model
• use the coefficients from the model and create a mathematical equation.
• predict the weight of new observations using the predict() function.

Answer 2

You can try something like this:

# The predictor vector.
a <- c(111, 123, 134, 156, 145, 176, 198, 133, 131, 181)

# The resposne vector.
b <- c(56, 61, 65, 71, 45, 54, 74, 76, 68, 58)

# Apply the lm() function.
relation <- lm(a~b)

# Find weight of a person with height 170.
z <- data.frame(x = 170)
result <-  predict(relation,z)
print(result)