I'm facing an issue with the use of Redim in VBA of MS Excel in a 3D array. How can I append a new array with different dimension than the first one to the first array and then another one and then ...; and then be able to read a specific group of data from this newly created matrix (array) with different number of columns in each row, for example, the 2nd group of data. Here is an example to clarify the matter.
Arr1 is in 3x3
Arr2 is in 5x5
Arr3 is in 7x7
Arr4 is in 9x9
Arr5 is in 11x11 dimensions.
Now if I append them together the resulting matrix should be in this format - for example:
1 2 3
4 5 6
7 8 9
1 2 3 4 5
6 7 8 9 1
2 3 4 5 6
7 8 9 1 2
3 4 5 6 7
...
...
1 2 3 ... 11
1 2 3 ... 11
(another 8 rows)
1 2 3 ... 11
(total of 11 rows)
Next I want to be able to read a group of data (sub-matrix) from the resulting matrix, for example the 2nd group of data, which is in 5x5.
If I use Redim in between each loop, while appending those new group of arrays and so to adjust the dimensions of the first matrix and continuing to do so, the last dimension will be in 11x11, which does not give me the needed dimension; in this case 5x5.
I was wondering, if there is any recommendation you could kindly provide. Thank you.
Related
I have the following table in Excel.
A B C D E
1 i x y mu sigma
2 0 1 2 =average(b$1:b1,b3:b$12) =stdev.s(b$1:b1,b3:b$12)
3 1 3 4 =average(b$1:b2,b4:b$12) =stdev.s(b$1:b2,b4:b$12)
4 2 2 1 =average(b$1:b3,b5:b$12) =stdev.s(b$1:b3,b5:b$12)
5 3 1 2 ... ...
6 4 2 5
7 5 4 7
8 6 8 1
9 7 2 3
10 8 5 9
11 9 1 3
The ith mu calculates the average without the ith observation—the leave-one-out average. I can also calculate the leave-one-out standard deviations, but how can I do this for the leave-one-out correlations then? correl requires two arrays and I cannot feed two or more distant cells as one array using commas. Can I input non-consecutive cells as one array? For example, I tried =correl((b$1:b1,b3:b$12),(c$1:c1,c3:c$12)), but failed. Thanks for your reading.
Because CORREL takes arrays we can use an array formula:
=CORREL(INDEX(B:B,N(IF({1},MODE.MULT(IF(ROW($B$2:$B$11)<>ROW(),ROW($B$2:$B$11)*{1,1}))))),INDEX(C:C,N(IF({1},MODE.MULT(IF(ROW($C$2:$C$11)<>ROW(),ROW($C$2:$C$11)*{1,1}))))))
Use this easier array formula as per the OP(I overthought this):
=CORREL(IF(ROW($B$2:$B$11)=ROW(),"",$B$2:$B$11),IF(ROW($C$2:$C$11)=ROW(),"",$C$2:$C$11))
Being an array formula one needs to use Ctrl-shift-Enter instead of Enter when exiting edit mode.
This will pass two arrays of only the numbers not on the row where the formula is placed.
Now, eventually when microsoft releases the dynamic array formula into Office 365 this can be simplified using FILTER()
=CORREL(FILTER($B$2:$B$11,ROW($B$2:$B$11)<>ROW()),FILTER($C$2:$C$11,ROW($C$2:$C$11)<>ROW()))
I am working at moving my data over from Excel to Matlab. I have some data that I want to average based on multiple criteria. I can accomplish this by looping, but want to do it with matrix operations only, if possible.
Thus far, I have managed to do so with a single criterion, using accumarray as follows:
data=[
1 3
1 3
1 3
2 3
2 6
2 9];
accumarray(data(:,1),data(:,2))./accumarray(data(:,1),1);
Which returns:
3
6
Corresponding to the averages of items 1 and 2, respectively. I have at least three other columns that I need to include in this averaging but don't know how I can add that in. Any help is much appreciated.
For your single column, you don't need to call accumarray twice, you can provide a function handle to mean as the fourth input
mu = accumarray(data(:,1), data(:,2), [], #mean);
For multiple columns, you can use the row indices as the second input to accumarray and then use those from within the anonymous function to access the rows of your data to operate on.
data = [1 3 5
1 3 10
1 3 8
2 3 7
2 6 9
2 9 12];
tmp = accumarray(data(:,1), 1:size(data, 1), [], #(rows){mean(data(rows,2:end), 1)});
means = cat(1, tmp{:});
% 3.0000 7.6667
% 6.0000 9.3333
I have a very long column( 50000 rows) and I want select a range (sample) of cells (number of rows) in order to apply certain calculations. You don't have to worry about the calculation formula. Here I just need help on how to do the sampling. The range(sample) should be changing based on window size. The window size is a number I can choose .i.e such in the example below I chose the window size to be 4. In other words, I need to have samples, and these samples are based on selected number of rows of the long column. The size(number of rows) for all of the samples will be equal to the window size. However, each sample is shifted by one from the main column. Now, the samples should be in seperate columns , and thats why I need to copy the selection in each sample in its required column.For illustration purpose, assume the below example:
let assume the window size( number of rows)=4
test
1
2
3
4
5
6
7
8
9
10
The expected output should be :
main col sample1 sample2 sample3 sample4 sample5 sample6
1 1 2 3 4 5 6
2 2 3 4 5 6 7
3 3 4 5 6 7 8
4 4 5 6 7 8 9
5
6
7
8
9
10
each sample of size 4 rows , however, each new sample shifs by 1 from the main column. Note we get 6 samples to cover the whole number of rows in the main column. What basically should be done: sample1 will be from row1-to-row4 from the main col. Now, sample2 will be 4 values, however, from row2-to-row5, from the main column. sample3 will be 4 values, from row3-to-row6, and so on until we cover the whole range of the main column. So there are two main process, selection and copy of selection.
I have tried to use the offset and other logical function ... but it didn't work. I don't want to use Macros or VBA... Is there are any built in functions to solve the problem.?
This is basically a variation of a range transpose. Use the formula:
=INDEX($A:$A,COLUMN()+ROW()-2,1)
Then just copy to whatever window size you want. It will automatically move down the main column by one row for every column over it is. The result looks like this (you are responsible for copying the formula to the right size):
Bonus, you can automate the column header "Sample N" with:
="Sample " & COLUMN()-1
Does anyone know how to find or make a WPF container control that will display a two dimensional array of fixed-size sub-controls (the number of sub-controls varying at run time) such that the first row is filled, then the second row, and so on, until there are no more sub-controls or all the rows are filled. If the user makes the container wider then the number of columns should increase, so:
1 2 3
4 5 6
7 8 9
would become
1 2 3 4
5 6 7 8
9
I'm not sure how to ask this question without illustrating it, so here goes:
I have results from a test which has tested peoples attitudes (scores 1-5) to different voices on a 16 different scales. The data set looks like this (where P1,P2,P3 are participants, A, B, C are voices)
Aformal Apleasant Acool Bformal etc
P1 2 3 1 4
P2 5 4 2 4
P3 1 2 4 3
However, I want to rearrange my data to look like this:
formal pleasant cool
P1A 3 3 5
P1B 2 1 6
P1C etc
P1D
This would mean a lot more rows (multiple rows per participant), and a lot fewer columns. Is it doable without having to manually reenter all the scores in a new excel file?
Sure, no problem. I just hacked this solution:
L M N O P Q
person# voice# formal pleasant cool
1 1 P1A 2 3 1
1 2 P1B 4 5 2
1 3 P1C 9 9 9
2 1 P2A 5 4 2
2 2 P2B 4 4 1
2 3 P2C 9 9 9
3 1 P3A 1 2 4
3 2 P3B 3 3 2
3 3 P3C 9 9 9
Basically, in columns L and M, I made two columns with index numbers. Voice numbers go from 1 to 3 and repeat every 3 rows because there are nv=3 voices (increase this if you have voices F, G, H...). Person numbers are also repeated for 3 rows each, because there are nv=3 voices.
To make the row headers (P1A, etc.), I used this formula: ="P" & L2 & CHAR(64+M2) at P1A and copied down.
To make the new table of values, I used this formula: =OFFSET(B$2,$L2-1,($M2-1)*3) at P1A-formal, and copied down and across. Note that B$2 corresponds to the cell address for P1-Aformal in the original table of values (your example).
I've used this indexing trick I don't know how many times to quickly rearrange tables of data inherited from other people.
EDIT: Note that the index columns are also made (semi)automatically using a formula. The first nv=3 rows are made manually, and then subsequent rows refer to them. For example, the formula in L5 is =L2+1 and the formula in M5 is =M2. Both are copied down to the end of the table.