I have list of values save in variables like. A= 1,2,3,4,5,6,7 and B = 4,5,6,73,2,3,2 //This may be Array or column. Easy one will be preffered
Note A and B values will be dynamic which will be get through some function.
I want to save A's and B's Values in Excel Sheet, like A's values in First column and B's values in 2nd Column.
I read about xlswrite but did not find any scenerio as i require.
And when They are saved then Again want to read them, and to save them in some other variables like C and D. I want to save Data of first column in C and second column data in D.
I read about C = xlsread('filename') but problem with it is. This save all the values in one variable. like if Excell have two columns. Those both will be saved in one variable C. But my requirment is one colum in one varibale and so on.
Take a look at the Documentation
Syntax for writing to excel file
xlswrite(filename,A,sheet,xlRange)
Code:
%// As your variable is a row vector, it is transposed to column vector
%// before writing, as you preferred
xlswrite('outputFileName.xlsx',[A.',B.'],1,'D2')
Note: Make sure that the excel file is closed while writing
Syntax for reading from excel file
num = xlsread(filename,sheet,xlRange)
Code:
%// reading the range into one temporary variable
temp = xlsread('outputFileName.xlsx',1,'D2:E7')
C = temp(:,1)
D = temp(:,2)
I know English is not your primary language, but please try to be as gramatically correct as you can, it will make your questions easier to understand, and easier to answer to.
As for your question, I think you want to use the additional parameter in the functions you found to specify the columns you are writing to:
xlswrite('sheet.xls', A, 'E3')
will write the data of A on the cells E3, ..., E9.
And when you want to retrieve it, you do the same:
C = xlsread('sheet.xls', 'E3-E9')
This will read E3 to E9 cells and put the value in C.
Related
Let's say I have in B2 the formula =ROW(A1:A3). This formula gives an array of {1;2;3}. Because a cell only holds one value, cell B2 displays a value of 1. Any place in the worksheet, the formula =B2 gives 1, not the array. Yet, Excel still remembers the array because the formula is still in B2.
Is there any way to get the array back so it, the whole array, not its individual elements, can be used for further manipulation? I'm looking for something like OPERATION(B2) = {1;2;3}. For example, SUMPRODUCT(OPERATION(B2)) = SUMPRODUCT(ROW(A1:A3)) = 6.
As a workaround, you can store your formula in Name Manager, e.g.:
Then you can use it as a reference in Excel formulas, like =INDEX(Rows,2,1):
I realize that this is not the answer to the OP's question as they do not have the latest Office 365. I put this here for those who come later and do have it.
With the latest Office 365 with Dynamic array formulas this problem is now gone.
Putting =ROW(1:3) or the equivalent dynamic array formula =SEQUENCE(3) Excel will spill the array down automatically without the need of Ctrl-Shift-Enter:
And now one can refer to the array by only refering to A1 by putting # after the reference:
=SUM(A1#)
Then no matter how the array in A1 changes the other formula does not need to be changed.
The caveat is that the formula in A1 needs the room to spill down. If there is a cell that has anything in it that resides in the spill down array it will return an error.
Just to try and clarify this, arrays in Excel before the September 2018 update for Office 365 don't self-expand like they do in Google sheets, so if you put an array into a single cell you just get the first element of the array (see column A for example).
If you want to enter the array directly into the sheet, you have to select the cells you want it to occupy (say B2:B4) and enter it as an array formula (see column B) using CtrlShiftEnter
You can still use the array in another formula as long as it's expecting an array - e.g. with sumproduct you get the correct total, 6 (see column C).
=SUMPRODUCT(ROW(A1:A3))
Unfortunately this doesn't always work without entering the whole formula as an array formula (see column D).
=SUM(ROW(A1:A3))
EDIT
#JvDV is correct, you don't always get the first element of an array expression entered into a single cell - see this reference for explanation of the implicit intersection mechanism.
I have two methods, which might qualify as solutions or workarounds, depending on what technology you're willing to accept.
Both rely on retrieving the formula that produces the array from B2 and then evaluating that formula each time you invoke your OPERATION(B2).
Method 1: VBA
Create a UDF:
Function Arr(R as Range)
Arr = Application.Evaluate(R.Formula)
End Function
which you then invoke in a cell, e.g. =SUM(Arr(B2)).
Method 2: Name Manager + EVALUATE()
Note that this is different from Justyna's answer. The idea is to allow you to specify the address of the cell holding the array-generating formula.
Create a name that holds =EVALUATE(FORMULATEXT(INDIRECT(INDEX($1:$1048576;ROW();COLUMN()+1)))). This way you can specify that you want the content of the cell B2 by writing the string B2 to the nearest cell to the right of the cell in which you're using your newly created name.
Unfortunately, EVALUATE() cannot be used within a cell.
I am new to Python and am over complicating the coding on a project so I am starting with much smaller data sets in order to learn the process. My boss is having me compare two CSV files. The first CSV only contains the data 1,2,3,4,5,6 all in a single column. He wants me to set this CSV file as an array so I can compare the second CSV against it. The second CSV contains the data 3,5,6 all in a single column. The code should result in a print out of 1,2,4 as it is the only data not found in both CSV files.
I originally tried to write a code to import both CSV files and compare data without setting it as an array but this did not work so the first CSV file needs to be set as an array. The problem is I am not sure exactly how to do this with an array. This is what I have so far, any help anyone could give me would be greatly appreciated. I have been working on this project for a week now and am at a total loss, even with this simplified form.
import csv
temp_list = []
with open('1.csv','rb') as csvfile:
reader = csv.reader(csvfile, delimiter=',')
for row in reader:
In terms of psuedo-code, what you need to do here is import both csv files into two separate arrays, Array A and Array B for example.
Now what you need to do is compare each index position in one array, to each index position in the other array.
You need to create a nested loop, where the outer loop will choose an index position in A and then inner loop chooses a position in B.
After you check one index in A with each position in B, and no positions are the same, I suggest adding this value into a third array, C. You can check which positions are the same by using a boolean flag. When your code is done, C will have any values that don't exist in both A and B.
I suggest following these tutorials to learn more about python syntax:
https://www.w3schools.com/python/
Good luck
I have a table in Matlab crsp and and cell array of numbers that serve as keys. I want to retrieve information from the table using that cell array which is stored as a variable. My code is as follows:
function y = generateWeights(permno_vector, this_datenum, crsp)
crsp(crsp.PERMNO == permno_vector,:);
crsp is defined as a table while permno_vector is the cell array. It contains a couple permnos that are used to retrieve information.
In this case, my code is not working and will not allow me to access the values in crsp. How do we access table values using a vector array?
As James Johnstone points out, the first problem with the code you've posted is that it doesn't assign anything to y, so as written your function doesn't return a value. Once you've fixed that, I assume the error you are seeing is Undefined operator '==' for input arguments of type 'cell'. It's always helpful to include this sort of detail when asking a question.
The syntax
crsp(crsp.PERMNO == x,:)
would return those rows of crsp that had PERMNO equal to x. However if you want to supply a list of possible values, and get back all the rows of your table where your target variable matches one of the values in the list, you need to use ismember:
crsp(ismember(crsp.PERMNO, cell2mat(permno_vector)),:)
if permno_vector is a cell array, or simply:
crsp(ismember(crsp.PERMNO, permno_vector),:)
if you can instead supply permno_vector as a numeric vector (assuming of course the data in crsp.PERMNO is also numeric).
I am newer to programming and I am trying to figure out how I can add all of the numbers from the B column together and all of the C column together and the D column together with those variables named x y and z respectively. I have been searching everywhere for an answer. All I have gotten is to read the first line of the csv file.
This is a screenshot of part of the CSV file:
Once you've read it in, you need to somehow split it up into actual columns. Check this function, that should help.
strtok()
Then you need to store it in some kind of array. Then index which elements in the array you want, and process them by using a cumulative sum. This might require a while loop until you've reached the last line of the file.
I will leave the actual code to you, but this should get you going.
In my excel document I have two sheets. The first is a data set and the second is a matrix of the relationship between two of the variables in my data set. Each possibility of the variable is a column in my matrix. I'm trying to get the sum of the products of the elements in two different arrays. Right now I'm using the formula {=SUM(N3:N20 * F3:F20)} and manually changing the columns each time. But my data set is over 800 items...
Ideally I'd like to know how to write a program that reads the value of the variable in my dataset looks up the correct columns in the matrix, multiplies them together, sums the products, and puts the result in the correct place in my data set. However, just knowing the result for all the possible combinations of columns would also save me alot of time. Its an 18x18 matrix. Thanks for any feedback!
Your question is a little bit ambiguous but as far as i understand your question you want to multiply different sets of two columns in the same sheet and put their result into the next sheet, is it so? if so, please post images of your work (all sheets). Your answer is possible even in Excel only without any vba code, thanks.
you can also use =SUMPRODUCT(N3:N20,F3:F20) for your formula instead of {=SUM(N3:N20 * F3:F20)}