BMI(Body Mass Index) Calculator

• Input: Height and Weight(Mass)
• Output: BMI(Body Mass Index)
• Formular: \[BMI = \frac{mass_{kg}}{(height_m)^2} = \frac{mass_{lb}}{(height_{in})^2 }\]

BMI Weight Catorgries

• Website: https://davidhhshao.shinyapps.io/BMICalculator
• Steps:
  1. Select the unit for weight and height inputs on the left panel. There are two choices: Standard and Metric. For Standard, Height uses feet and inch, and Weight uses pounds; for Metric, Height uses centimeters, and Weight uses kilograms
  2. Input the numerical values of Height and Weight fields
  3. Click Go! button (It is not necessay because it will update the output automatically). Then you can get your BMI value and Weight Category on the right panel.

• Input: \(Height = 180cm\) and \(Weight = 90 kilograms\)

Category <- c("Underweight", "Normal Weight", "Overweight", "Obesity")
get_weight_catory <- function(height, weight){ 
 bmi <- round( weight/ ((height/100) * (height/100)), digit = 1) 
 if(bmi< 18.5){ category<-  Category[1]} 
 else if (bmi>=18.5 & bmi<= 24.9){category<-Category[2]}
 else if( bmi >= 25 & bmi <= 29.9){category<-Category[3]} else{category<-Category[4]}
 return (c( "BMI" =  bmi, " Weight Catorgary" = category) )
}

• Output: BMI & Weight Catorgary

get_weight_catory(180, 90)

##               BMI:   Weight Catorgary : 
##              "27.8"        "Overweight"