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I'm trying to make some plots of distributions in R and i have the code but it just won't run, it says there's an unexpected symbol.
curve(dexp(x, rate=3) xlim=c(0,40), main="exp(rate=3) population
distribution", xlab="X", ylab="f(x)")
Im trying to plot an exponential random variable with rate 3.
You are missing a comma between dexp(x, rate=3) and xlim=c(0,40)
curve(dexp(x, rate=3), xlim=c(0,40), main="exp(rate=3) population
distribution", xlab="X", ylab="f(x)")
Related
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Code:
data(tips)
tips%>%
group_by(sex)%>%
summarize(variance=var(tip))
Output:
variance
1 1.914455
The output isn't the desired one. The result should be a tibble with variance computed against each group (in this case, sex). The summarize function is computing the variance of the entire tip column, rather than calculating the variance of each group.
Tried executing the code and restarting RStudio several times, but it didn't work.
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I am doing an exercise to create a function. One of the questions is:
"We can estimate the cumulative risk of an certain event using the
exponential formula
1-exp(-1/10000*t) where t is the time to the event. Create a function ans(t), which returns the risk at time t.
and I am using this command:
function(t){ans(t)<-1-exp(-1/10000*t)return(ans(t))}
but it is giving wrong answer. Can someone help me to understand this please?
The proper format to define a function is this:
ans<-function(t){
answer<-1-exp(-1/10000*t)
return(answer)
}
ans(1)
#[1] 9.9995e-05
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I would like to calculate Mann Attached imageKendall statistics in R. i have an excel sheet with rainfall and years. how would i best get it
Looking at the attached image you should not put Book1$Mean in quotes. Try using:
MannKendall(Book1$Mean)
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In running a knitr report I noticed that ggplot2 produces a graph without y-ticks/labels on Windows, but does on my Linux/Rstudio install.
The following codes shows the issue for me.
df=data.frame(pos=seq(1,10),data=seq(10,1,-1))
ggplot(data=df, aes(x=pos,y=data))+
scale_y_discrete(breaks=seq(1,10,2))+
geom_line()
Here are the graphs that I get:
Windows
Linux
The breaks show if I remove the scale_y_discrete function call, however I need it for formatting my output.
Is this an environmental issue? A configuration issue?
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I'm trying to do a simple calculation with my mean function. When I input mean(1, 10, 100), R returns 1, which is obviously not the correct average. It always returns the first entry of my vector. What went wrong?
You should use mean(c(1,10,100))
See http://www.rdocumentation.org/packages/base/functions/c