"normdrawandfill" is a package with function "normdrawandfill" to draw Normal distribution density curve (bell curve) and highlight different areas of distribution by filling the area with chosen color and displaying Probability percentages.
normdrawandfill(mean=0,sd=1,points=200,linecolor="orange",fillcolor = "blue",fillafter = NULL, fillbefore = NULL, fillwithin = NULL,thickness=40, xlabel = NULL, ylabel = NULL, axiscol = "red")
mean - mean value of data
sd - standard deviation value of data
points - default value is 200. Changing this value will change the length of x-axis
linecolor - line color of normal curve
fillcolor - color of the shaded area
fillafter - area after this x coordinate will be shaded
fillbefore - area before this x coordinate will be shaded
fillwithin - c(x1,x2) area within these two x coordinates will be shaded
thickness - integer value defining the density of shaded area
xlabel - Label for the x-axis
ylabel - Label for the y-axis
axiscol - color to highlight distance between mean and standard deviation in x-axis
#Normal Distribution Curve normdrawandfill(20000,5102,linecolor = "blue", xlab = "Quantity", ylab = "Probability Density") #P(10000<X<30000) normdrawandfill(20000,5102,linecolor = "red", xlab = "Quantity", ylab = "Probability Density",fillwithin = c(10000,30000), fillcolor = "cyan", thickness = 100) d1 = paste(" P(10000<X<30000)=", "95%") text(30000,0.00006,d1, font = 2, cex = 0.8) #P(X<10000) normdrawandfill(20000,5102,linecolor = "blue", xlab = "Quantity", ylab = "Probability Density",fillbefore = 10000, fillcolor = "lightgreen") d1 = paste(" P(X<10000)=", "0.025%") text(8000,0.00006,d1, font = 2, cex = 0.8) #P(X>30000) normdrawandfill(20000,5102,linecolor = "blue", xlab = "Quantity", ylab = "Probability Density",fillafter = 30000, fillcolor = "red") d1 = paste(" P(X>30000)=", "0.025%") text(30000,0.00006,d1, font = 2, cex = 0.8)
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