subtraction Questions
1
Solved
I want to filter my data set for all the dates before a certain date. Specifically 1 day before the current date.
I tried the code below:
df = df.filter(F.col('date') <= F.current_date() - 1...
Stere asked 12/2, 2019 at 20:24
8
I have a long string, which is basically a list like str="lamp, bag, mirror," (and other items)
I was wondering if I can add or subtract some items, in other programming languages I can easily do:...
Greatest asked 26/8, 2013 at 23:18
2
Solved
I am attempting to calculate the difference in days between todays and a pandas data consisting of historical data. Below is the intended code:
df['diff'] = pd.to_datetime( df['date']) - pd.dateti...
Cordovan asked 20/12, 2018 at 11:12
1
Solved
The reduced version of my dataset is as shown below.
Z_dog1_mu1 Z_dog2_mu1 Z_dog3_mu1 Z_cat1_mu1 Z_cat2_mu1 Z_cat3_mu1
0.0000 0.0000 0.0001 0.0005 0.0043 0.0045
0.0039 -0.0016 -0.0102 -0.000...
Scheelite asked 10/10, 2018 at 1:47
4
Solved
So if today was April 12, 2010
it should return October 1, 2009
Some possible solutions I've googled seem overly complex, any suggestions?
Creosote asked 12/4, 2010 at 21:8
3
Solved
I wanted to subtract one column from the other in R and this turned out more complicated than I thought.
Suppose this is my data (columns a and b) and column c is what I want, namely a - b but kee...
Atahualpa asked 2/9, 2018 at 14:37
2
Solved
I would like to do an update by doing a simple addition on Sequelize.
table:
id || data
1 || 10
sample:
db.table.update({ data : 1 }, { where: { id: 1 }});
after this query
id || data
...
Serilda asked 14/2, 2018 at 2:33
7
Solved
ok, i need my code to check if minus/subtract/- was pressed, if it was pressed i want an alert box to pop. i tried with both 109 and 189 key codes but i still don't get the desired result. although...
Alisiaalison asked 13/12, 2009 at 23:5
4
I've been reading around and with the 8086 Instruction Set, it says that a CMP (compare) can set the Carry Flag. I understand that a compare subtracts two operands but I was wondering if anyone can...
Airtight asked 7/11, 2011 at 0:43
1
Solved
I have a pandas dataframe with two multiindex levels
df
Out[202]:
A B C D
first second
1 1 -0.080810 0.865259 -0.371148 0.346480
2 -0.026636 1.259460 -1.109295 -0.871204
3 0.372008 -1.778272 ...
Unreconstructed asked 2/4, 2018 at 7:35
2
Solved
How do I subtract one row from another in the following dataframe (df):
RECL_LCC 1 2 3
RECL_LCC 35.107655 36.015210 28.877135
RECL_PI 36.961519 43.499506 19.538975
I want to do something like:
...
Lightproof asked 1/11, 2014 at 2:0
2
Solved
I have a dataframe with two columns: Category and Datetime
I want to create a new column that shows the difference between the Datetime of the current row vs the previous row, restarting at each c...
Haiku asked 26/2, 2018 at 22:44
4
Solved
How can I subtract one image from another using openCV?
Ps.: I coudn't use the python implementation because I'll have to do it in C++
Suzettesuzi asked 23/3, 2010 at 17:2
3
Solved
I have a data frame that looks like:
kfm <- data.frame ("data_source"=c("kfm", "kfm", "kfm", "kfm"),
"1996"= c(56, 56, 56, 57),
"1997"=c(8, 8, 9, 7),
"1998"= c(101, 102, 101, 105))
I wan...
Sixth asked 11/2, 2018 at 19:36
3
Solved
I am trying to find the difference in times between two columns in a pandas dataframe both in datetime format.
Below is some of the data in my dataframe and the code I have been using. I have trip...
Chromosphere asked 17/6, 2017 at 4:26
3
Solved
I have two netcdf files: downwelling radiation named rsds.nc and confined radiation named rsns.nc. rsds.nc contains a variable named rsds and rsns.nc contains a variable named rsns. Now I would lik...
Urbina asked 4/1, 2017 at 9:23
2
Solved
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 t...
Pood asked 29/3, 2017 at 16:16
2
Solved
I'm taking a computer organization and assembly language course. The written part of our lab this week has a question on it that has me stumped. The question reads...
Subtract the following unsign...
Histaminase asked 1/3, 2012 at 20:6
1
Solved
I have a dataframe like this:
import pandas as pd
dic = {'A':[100,200,250,300],
'B':['ci','ci','po','pa'],
'C':['s','t','p','w']}
df = pd.DataFrame(dic)
My goal is to separate the row in...
Bummer asked 8/12, 2016 at 15:27
1
Solved
I have two dataframes with only somewhat overlapping indices and columns.
old = pd.DataFrame(index = ['A', 'B', 'C'],
columns = ['k', 'l', 'm'],
data = abs(np.floor(np.random.rand(3, 3)*10)))
n...
Aboral asked 17/11, 2016 at 12:23
7
Solved
I'm trying to find the distance in memory between two variables. Specifically I need to find the distance between a char[] array and an int.
char data[5];
int a = 0;
printf("%p\n%p\n", &...
Trix asked 16/11, 2016 at 11:32
5
I can't figure out how to make a function in python that can calculate this:
List1=[3,5,6]
List2=[3,7,2]
and the result should be a new list that substracts List2 from List1, List3=[0,-2,4...
Joung asked 19/11, 2011 at 12:50
7
Solved
I have two strings containing a date like so"
start_date = 'Sun Sep 16 16:05:15 +0000 2012'
end_date = 'Sun Sep 17 23:55:20 +0000 2012'
I need to perform: end_date - start_date
It should return ...
Seymore asked 8/11, 2012 at 16:15
2
Solved
We (people) take more time to multiply, add, divide and subtract two large numbers than two small numbers.
Does a computer take more time to multiply 5 * 2 than say 51234 * 987654 or is the operat...
Zymosis asked 8/3, 2016 at 13:26
1
Solved
I am trying to build up subtraction, addition, division, multiplication and other operations using only following ones:
incr(x) - Once this function is called it will assign x + 1 to x
assign(x, ...
Marola asked 3/12, 2015 at 23:27
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