Fill Column in CSV with previous value using shell - shell

I have the following File that can be generated like the below by pulling information from a webpage, however as you can see it is missing Dates on Rows 4,5,7 & 8:
1,Nov 09 2016,Pakistan,Karachi Stock Exchange,Iqbal Day
2,Nov 11 2016,Poland,Warsaw Stock Exchange,Independence Day
3,Nov 14 2016,Colombia,Colombia Stock Exchange,Independence of Cartagena
4,,India,India National Stock Exchange,Guru Nanak Jayanti
5,,Sri Lanka,Colombo Stock Exchange,Ill Full Moon Poya Day
6,Nov 15 2016,Brazil,Sao Paulo Stock Exchange,Republic Day
7,,Palestinian Territory,Ramallah Stock Exchange,Independence Day
8,,Sri Lanka,Colombo Stock Exchange,Ill Full Moon Poya Day
What I would need to achieve is to Fill the Date from row3 into 4 and 5 and the Date from row6 into 7 & 8, this file could have more than the 8 lines above and will require all blank lines to be filled with what is in the previous cell. I've tried all different types of answers on Stackoverflow but none are able to do what I require.

Assuming that the first row is complete. (with Date value in column 2). Give this awk one-liner a try:
awk -F, -v OFS="," '{$2=$2?$2:d;d=$2}7' file
With your input, it outputs:
1,Nov 09 2016,Pakistan,Karachi Stock Exchange,Iqbal Day
2,Nov 11 2016,Poland,Warsaw Stock Exchange,Independence Day
3,Nov 14 2016,Colombia,Colombia Stock Exchange,Independence of Cartagena
4,Nov 14 2016,India,India National Stock Exchange,Guru Nanak Jayanti
5,Nov 14 2016,Sri Lanka,Colombo Stock Exchange,Ill Full Moon Poya Day
6,Nov 15 2016,Brazil,Sao Paulo Stock Exchange,Republic Day
7,Nov 15 2016,Palestinian Territory,Ramallah Stock Exchange,Independence Day
8,Nov 15 2016,Sri Lanka,Colombo Stock Exchange,Ill Full Moon Poya Day

Related

DAX number of days

Can you please help how I can return the total number of days for each month in a given quarter?
For example, I already have 92 days for December 2025 but how can I show 92 days for October and November as well?
If you want only a count, you can use measure:
QuarterDays = calculate(countrows(VALUES('Calendar'[Date])), FILTER(ALL('Calendar'), selectedvalue('Calendar'[Year]) = 'Calendar'[Year] && selectedvalue('Calendar'[Quarter]) = 'Calendar'[Quarter] ))

Performance for adfuller and SARIMAX

This is somewhat of a continuation of a previous post but I am trying to forecast weekly revenues. My program seems to hang on the adfuller test. It has run before and appears stationary via p-value but not consistently. I have added SARIMAX in as well and the code just hangs. If I cancel out I get a message towards the bottom (periodically) that says the problem is unconstrained.
Data:
Week | Week_Start_Date |Amount |year
Week 1 2018-01-01 42920 2018
Week 2 2018-01-08 37772 2018
Week 3 2018-01-15 41076 2018
Week 4 2018-01-22 38431 2018
Week 5 2018-01-29 101676 2018
Code:
x = organic_search.groupby('Week_Start_Date').Amount.sum()
# Augmented Dickey-Fuller test
ad_fuller_result = adfuller(x)
print(f'ADF Statistic: {ad_fuller_result[0]}')
print(f'p-value: {ad_fuller_result[1]}')
# SARIMA Model
plt.figure(2)
best_model = SARIMAX(x, order=(2, 1, 1), seasonal_order=(2, 1, 1, 52)).fit(dis=1)
print(best_model.summary())
best_model.plot_diagnostics(figsize=(15,12))
I am only working with 185 or so rows. I don't understand why code is just hanging. Any optimization suggestions welcome (for adfuller and SARIMAX).
Fixed via passing organic_search['Amount'] instead of organic_search.groupby('Week_Start_Date').Amount.sum()

D3 js scaleTime to 365 ~ 366 days in different years

d3.timeParse can parse the time format, but no matter how the format is set, the result contains the year, month, day, hour, minute, and second.
Like this: Sat Jan 01 2020 00:00:00
It can't only correspond to the month and day, if i want to use d3.scaleTime () to scale to compare data of different years, how can I implement it?
For example:
===axis=======
x-axis: 12 month 366 day
y-axis: [max(value), mim(value)]
===data=======
data 1: 2016 = [{ date:2016/01/01,value=18},{ date:2016/01/02,value=199},...,{ date:2016/12/31,value=27}] (366 day)
data 2: 2017 = [{ date:2017/01/01,value=58},{ date:2017/01/02,value=9},...,{ date:2017/12/31,value=217}] (365 day)
data 3: 2018 (365 day)
.
.
data n: 2020 (366 day)

NEXT_DAY in Crystal Reports

Is there anything like the Oracle "NEXT_DAY" function available in the syntax that Crystal Reports uses?
I'm trying to write a formula to output the following Monday # 9:00am if the datetime tested falls between Friday # 9:00pm and Monday # 9:00am.
So far I have
IF DAYOFWEEK ({DATETIMEFROMMYDB}) IN [7,1]
OR (DAYOFWEEK({DATETIMEFROMMYDB}) = 6 AND TIME({DATETIMEFROMMYDB}) in time(21,00,00) to time(23,59,59))
OR (DAYOFWEEK({DATETIMEFROMMYDB}) = 2 AND TIME({DATETIMEFROMMYDB}) in time(00,00,00) to time(08,59,59))
THEN ...
I know I can write seperate IF statements to do a different amount of DateAdd for each of Fri, Sat, Sun, Mon, but if I can keep it concise by lumping all of these into one I would much prefer it. I'm already going to be adding additional rules for if the datetime falls outside of business hours on the other weekdays so I want to do as much as possible to prevent this from becoming a very overgrown and ugly formula.
Since there is no CR equivalent that I know of, you can just cheat and borrow the NEXT_DAY() function from the Oracle database. You can do this by creating a SQL Expression and then entering something like:
-- SQL Expression {%NextDay}
(SELECT NEXT_DAY("MYTABLE"."MYDATETIME", 'MONDAY')
FROM DUAL)
then you could either use that directly in your formula:
IF DAYOFWEEK ({MYTABLE.MYDATETIME}) IN [7,1]
OR (DAYOFWEEK({MYTABLE.MYDATETIME}) = 6 AND TIME({MYTABLE.MYDATETIME}) in time(21,00,00) to time(23,59,59))
OR (DAYOFWEEK({MYTABLE.MYDATETIME}) = 2 AND TIME({MYTABLE.MYDATETIME) in time(00,00,00) to time(08,59,59))
THEN DateTime(date({%NextDay}),time(09,00,00))
Or, the even better way would be to just stuff ALL of the logic into the SQL Expression and do away with the formula altogether.
Considering Sunday is 1
And the first 7 is the week we want to back
7 = 1 week
14 = 2 weeks
The last Number (1) is 1 for Sunday, 2 for Monday, 3 for Tuestday
Last Sunday 1 week ago
Today - 7 + ( 7 - WEEKDAY(TODAY) )+1
Last Monday 2 weeks ago
Today - 14 + ( 7 - WEEKDAY(TODAY) )+2
So this 2 formulas give me MONDAY LAST WEEK and SUNDAY LAST WEEK.
EvaluateAfter({DATETIMEFROMMYDB}) ;
If DayOfWeek ({DATETIMEFROMMYDB}) In [crFriday,crSaturday,crSunday,crMonday]
then
IF DayOfWeek ({DATETIMEFROMMYDB}) In [crFriday]
AND TIME({DATETIMEFROMMYDB}) >= time(21,00,00)
then //your code here
Else if Not(DayOfWeek ({DATETIMEFROMMYDB}) In [crFriday] )
AND (TIME({DATETIMEFROMMYDB}) >= time(00,00,00) AND TIME({DATETIMEFROMMYDB}) <= time(23,59,59))
then //your code here
Else if DayOfWeek ({DATETIMEFROMMYDB})In [crMonday]
AND TIME({DATETIMEFROMMYDB}) < time(09,00,00)
then //your code here

algorithm for calculating a week # from a date with custom start of week? (for iCal)

I can only find algorithm for getting ISO 8601 week (week starts on a Monday).
However, the iCal spec says
A week is defined as a seven day period, starting on the day of the
week defined to be the week start (see WKST). Week number one of the
calendar year is the first week that contains at least four (4) days
in that calendar year.
Therefore, it is more complex than ISO 8601 since the start of week can be any day of the week.
Is there an algorithm to determine what is the week number of a date, with a custom start day of week?
or... is there a function in iCal4j that does this? Determine a weekno from a date?
Thanks!
p.s. Limitation: I'm using a JVM language that cannot extend a Java class, but I can invoke Java methods or instantiate Java classes.
if (input_date < firstDateOfTheYear(WKST, year))
{
return ((isLeapYear(year-1))?53:52);
}
else
{
return ((dayOfYear(input_date) - firstDateOfTheYear(WKST, year).day)/7 + 1);
}
firstDateOfTheYear returns the first calendar date given a start of week(WKST) and the year, e.g. if WKST = Thursday, year = 2012, then it returns Jan 5th.
dayOfYear returns sequencial numerical day of the year, e.g. Feb 1st = 32
Example #1: Jan 18th, 2012, start of week is Monday
dayOfYear(Jan 18th, 2012) = 18
firstDateOfTheYear(Monday, 2012) = Jan 2nd, 2012
(18 - 2)/7 + 1 = 3
Answer Week no. 3
Example #2: Jan 18th, 2012, start of week is Thursday
dayOfYear(Jan 18th, 2012) = 18
firstDateOfTheYear(Thursday, 2012) = Jan 5th, 2012
(18 - 5)/7 + 1 = 2
Answer Week no. 2
Example #3: Jan 1st, 2012, start of week is Monday
firstDateOfTheYear(Monday, 2012) = Jan 2nd, 2012
IsLeapYear(2012-1) = false
Jan 1st, 2012 < Jan 2nd, 2012
Answer Week no. 52
Let daysInFirstWeek be the number of days on the first week of the year that are in January. Week starts on a WKST day. (e.g. if Jan 1st is a WKST day, return 7)
Set dayOfYear to the n-th days of the input date's year (e.g. Feb 1st = 32)
If dayOfYear is less than or equal to daysInFirstWeek
3.1. if daysInFirstWeek is greater than or equal to 4, weekNo is 1, skip to step 5.
3.2. Let daysInFirstWeekOfLastYear be the number of days on the first week of the previous year that are in January. Week starts on a WKST day.
3.3. if daysInFirstWeekOfLastYear is 4 or last year is Leap year and daysInFirstWeekOfLastYear is 5, weekNo is 53, otherwise weekNo is 52, skip to step 5.
Set weekNo to ceiling((dayOfYear - daysInFirstWeek) / 7)
4.1. if daysInFirstWeek greater than or equal to 4, increment weekNo by 1
4.2. if daysInFirstWeek equal 53 and count of days on the first week (starting from WKST) of January in the year of inputDate's year + 1 is greater than or equal to 4, set weekNo to 1
return weekNo

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