summary

问题 I have data such as this data=data.table("School"=c(1,1,1,1,1,1,0,1,0,0,1,1,1,0,1,0,1,1,1,1,1,0,0,1,0,1,1,1,1,1,1,0,1,0,1,0), "Grade"=c(0,1,1,1,0,0,0,1,1,1,0,1,1,0,0,1,1,1,0,0,1,1,0,1,0,0,1,0,1,1,0,0,0,0,1,0), "CAT"=c(1,0,1,1,0,1,0,1,1,0,1,0,0,1,0,1,0,0,0,0,0,0,1,0,0,1,1,0,0,1,1,0,1,1,1,1), "FOX"=c(1,1,0,1,1,1,1,1,0,0,0,1,1,1,0,0,1,1,1,1,1,1,1,0,1,1,0,0,1,0,0,1,0,0,1,0), "DOG"=c(0,0,0,1,0,0,1,0,0,1,0,1,1,1,0,1,1,0,0,1,1,0,0,1,0,1,1,0,1,0,1,1,1,0,1,1)) and wish to achieve a new data table such

问题 I have data such as this data=data.table("School"=c(1,1,1,1,1,1,0,1,0,0,1,1,1,0,1,0,1,1,1,1,1,0,0,1,0,1,1,1,1,1,1,0,1,0,1,0), "Grade"=c(0,1,1,1,0,0,0,1,1,1,0,1,1,0,0,1,1,1,0,0,1,1,0,1,0,0,1,0,1,1,0,0,0,0,1,0), "CAT"=c(1,0,1,1,0,1,0,1,1,0,1,0,0,1,0,1,0,0,0,0,0,0,1,0,0,1,1,0,0,1,1,0,1,1,1,1), "FOX"=c(1,1,0,1,1,1,1,1,0,0,0,1,1,1,0,0,1,1,1,1,1,1,1,0,1,1,0,0,1,0,0,1,0,0,1,0), "DOG"=c(0,0,0,1,0,0,1,0,0,1,0,1,1,1,0,1,1,0,0,1,1,0,0,1,0,1,1,0,1,0,1,1,1,0,1,1)) and wish to achieve a new data table such

问题 I have data such as this data=data.table("School"=c(1,1,1,1,1,1,0,1,0,0,1,1,1,0,1,0,1,1,1,1,1,0,0,1,0,1,1,1,1,1,1,0,1,0,1,0), "Grade"=c(0,1,1,1,0,0,0,1,1,1,0,1,1,0,0,1,1,1,0,0,1,1,0,1,0,0,1,0,1,1,0,0,0,0,1,0), "CAT"=c(1,0,1,1,0,1,0,1,1,0,1,0,0,1,0,1,0,0,0,0,0,0,1,0,0,1,1,0,0,1,1,0,1,1,1,1), "FOX"=c(1,1,0,1,1,1,1,1,0,0,0,1,1,1,0,0,1,1,1,1,1,1,1,0,1,1,0,0,1,0,0,1,0,0,1,0), "DOG"=c(0,0,0,1,0,0,1,0,0,1,0,1,1,1,0,1,1,0,0,1,1,0,0,1,0,1,1,0,1,0,1,1,1,0,1,1)) and wish to achieve a new data table such

问题 i have a page where i am using validation summary and required field validators. When i click the validation button error message is being dispalyed in both validation summary is showing message written in required field validators. I want to display different message in validation summary and required field validators. e.g validation summary should display "field marked with * are mandatory" and required field validator should display only a "*". Thanks 回答1: Set your validator's Text

问题 i have a page where i am using validation summary and required field validators. When i click the validation button error message is being dispalyed in both validation summary is showing message written in required field validators. I want to display different message in validation summary and required field validators. e.g validation summary should display "field marked with * are mandatory" and required field validator should display only a "*". Thanks 回答1: Set your validator's Text

问题 I have a data with two columns. In one column it is date and in another column it is flow data. I was able to read the data as date and flow data. I used the following code: creek <- read.csv("creek.csv") library(ggplot2) creek[1:10,] colnames(creek) <- c("date","flow") creek$date <- as.Date(creek$date, "%m/%d/%Y") The link to my data is https://www.dropbox.com/s/eqpena3nk82x67e/creek.csv Now, I want to find the summary of each year. I want to especially know mean, median, maximum etc. Thanks

问题 I can't solve this problem. I have preference screen and there is sub-preference that opens up another screen. On that another screen change of items can be caught with OnSharedPreferenceChangeListener and I change summary in parent preference screen, but when I go back to that parent preference screen, summary did not changed. Same question was asked here, but conclusion was not clear, and I could not solve this problem. It seems a common problem to me and I guess there is good solution for

问题 There's an exercise in Khan Academy' Probability and Statistics course on creating box-and-whisker plot. Here's screenshot representing correct solution. But when I tried to check solution in R I got the following: d <- c(11, 4, 1, 4, 2, 2, 6, 10, 5, 6, 0, 6, 3, 3) summary(d) Min. 1st Qu. Median Mean 3rd Qu. Max. 0.00 2.25 4.00 4.50 6.00 11.00 You can see 2.25 value for 1st Qu. But the correct value is 2. Any other values returned with summary() are correct. Any ideas why summary() returns

问题 There's an exercise in Khan Academy' Probability and Statistics course on creating box-and-whisker plot. Here's screenshot representing correct solution. But when I tried to check solution in R I got the following: d <- c(11, 4, 1, 4, 2, 2, 6, 10, 5, 6, 0, 6, 3, 3) summary(d) Min. 1st Qu. Median Mean 3rd Qu. Max. 0.00 2.25 4.00 4.50 6.00 11.00 You can see 2.25 value for 1st Qu. But the correct value is 2. Any other values returned with summary() are correct. Any ideas why summary() returns

问题 This question already has answers here : How to sum a variable by group (13 answers) Closed 4 years ago . I have a dataframe that contains a plot ID (plotID), tree species code (species), and a cover value (cover). You can see there are multiple records of tree species within one of the plots. How can I sum the "cover" field if there are duplicate "species" rows within each plot? For example, here is some sample data: # Sample Data plotID = c( "SUF200001035014", "SUF200001035014",