date

问题 I have DF$Date in the as.Date format "yyyy-mm-dd" as shown below. Is there an easy way to get these grouped by month in ggplot? Date 2015-07-30 2015-08-01 2015-08-02 2015-08-06 2015-08-11 2015-08-12 I've added a column DF$Month as "year Monthname" (e.g. April 2015.) I'm doing this by DF$Month<-strftime(DF$Date,format="%B %Y") Is there a quick way to factor the month/years so that they are ordinal? I used a workaround by formatting using: DF$Month<-strftime(DF$Date,format="%Y-%m") so that the

问题 I have DF$Date in the as.Date format "yyyy-mm-dd" as shown below. Is there an easy way to get these grouped by month in ggplot? Date 2015-07-30 2015-08-01 2015-08-02 2015-08-06 2015-08-11 2015-08-12 I've added a column DF$Month as "year Monthname" (e.g. April 2015.) I'm doing this by DF$Month<-strftime(DF$Date,format="%B %Y") Is there a quick way to factor the month/years so that they are ordinal? I used a workaround by formatting using: DF$Month<-strftime(DF$Date,format="%Y-%m") so that the

问题 I am trying to plot an x-y plot, with x or y as date variable, and using a 3rd variable to color the points. I managed to do it if none of the 3 variables are date, using: ax.scatter(df['x'],df['y'],s=20,c=df['z'], marker = 'o', cmap = cm.jet ) After searching, I find out that for normal plot, we have to use plot_date(). Unfortunately, I haven't been able to color the points. Can anybody help me? Here is a small example: import matplotlib, datetime import matplotlib.pyplot as plt import

问题 I am trying to create a search page that takes a check in and check out date to check if a room is available. if a room has an existing booking and its date range overlaps with the user input then it is not outputted. otherwise if it does not have a booking or its current bookings does not overlap with user input then it is outputted. A check in can exist on another booking's check out date My current SQL outputs all rooms based on the number of beds only. for some reason it does not check

问题 I am trying to plot an x-y plot, with x or y as date variable, and using a 3rd variable to color the points. I managed to do it if none of the 3 variables are date, using: ax.scatter(df['x'],df['y'],s=20,c=df['z'], marker = 'o', cmap = cm.jet ) After searching, I find out that for normal plot, we have to use plot_date(). Unfortunately, I haven't been able to color the points. Can anybody help me? Here is a small example: import matplotlib, datetime import matplotlib.pyplot as plt import

问题 I have this script which I found on the internet to calculate the third Tuesday of every month - but I need to modify it to simply give me the 7th day of the month, and the same but plus any number of days). $FindNthDay=3 $WeekDay='Tuesday' [datetime]$Today=[datetime]::NOW $todayM=$Today.Month.ToString() $todayY=$Today.Year.ToString() [datetime]$StrtMonth=$todayM+'/7/'+$todayY while ($StrtMonth.DayofWeek -ine $WeekDay ) { $StrtMonth=$StrtMonth.AddDays(1) } $StrtMonth.AddDays(7*($FindNthDay-1)

问题 I have this script which I found on the internet to calculate the third Tuesday of every month - but I need to modify it to simply give me the 7th day of the month, and the same but plus any number of days). $FindNthDay=3 $WeekDay='Tuesday' [datetime]$Today=[datetime]::NOW $todayM=$Today.Month.ToString() $todayY=$Today.Year.ToString() [datetime]$StrtMonth=$todayM+'/7/'+$todayY while ($StrtMonth.DayofWeek -ine $WeekDay ) { $StrtMonth=$StrtMonth.AddDays(1) } $StrtMonth.AddDays(7*($FindNthDay-1)

问题 I have a script in which I subset my data according to some set time periods and wanted to subset all the records that had occurred in the last month. However if I try to subtract one month from today's date it yields an NA: > today <- Sys.Date() > today [1] "2017-03-29" > today - months(1) [1] NA I do have lubridate loaded but I think this calculation is being performed with base R. If I subtract 2 or more months it works fine: > today - months(2) [1] "2017-01-29" > today - months(3) [1]

问题 I have a script in which I subset my data according to some set time periods and wanted to subset all the records that had occurred in the last month. However if I try to subtract one month from today's date it yields an NA: > today <- Sys.Date() > today [1] "2017-03-29" > today - months(1) [1] NA I do have lubridate loaded but I think this calculation is being performed with base R. If I subtract 2 or more months it works fine: > today - months(2) [1] "2017-01-29" > today - months(3) [1]

问题 I have a script in which I subset my data according to some set time periods and wanted to subset all the records that had occurred in the last month. However if I try to subtract one month from today's date it yields an NA: > today <- Sys.Date() > today [1] "2017-03-29" > today - months(1) [1] NA I do have lubridate loaded but I think this calculation is being performed with base R. If I subtract 2 or more months it works fine: > today - months(2) [1] "2017-01-29" > today - months(3) [1]