# John

### University of Cape Town

Actif depuis 2016

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Calculations on cell pairs that meet multiple pre-defined criteria?
*My goal: Depending on which of the 5 scenarios is prevalent in each row (cell pairs in red, see below), make the calculation fo...

plus de 7 ans il y a | 1 réponse | 0

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Matlab's writetable() function only exporting partial data of a table
The _writetable()_ function at the end of my code only exports the first row (namely FR_1w, FR_2w and FR_3w), whereas I *wan...

plus de 7 ans il y a | 2 réponses | 0

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Question

Matlab's Movsum() doesn't start calc at defined starting point X in frame [X X+t]

plus de 7 ans il y a | 1 réponse | 0

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Matlab's 'VariableNames' not accepting mix of numerical & non-numerical entries
Suppose we have a 1x3 table: A=table(1,2,3); whose header names should contain a mix of numericals and non-numericals: ...

plus de 7 ans il y a | 1 réponse | 0

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How to create “Date” containers in Matlab, ignoring months and years?
My goal is to extract specific rows from a table (see below) that fall into specific "date" containers, e.g. month-end ( *25th-3...

plus de 7 ans il y a | 3 réponses | 1

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Question

How to overwrite 'NaN' strings in a table using the for-loop
I want to replace the strings 'NaN' with NaN in my table using a loop / or any other strategy that returns NaN, leaving all else...

plus de 7 ans il y a | 2 réponses | 0

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Question

Trailing Sum Calculation using pre-defined kernel starting at incorrect cell

plus de 7 ans il y a | 1 réponse | 0

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Question

How to transform 'double' into 'cell array'?
My code: B = zeros(height(A),1); col_names = A.Properties.VariableNames; % Replicate header names for k = 1:height(A...

plus de 7 ans il y a | 1 réponse | 0

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Question

How to let Matlab know 'NaN' should be treated as NaN?

plus de 7 ans il y a | 1 réponse | 0

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Question

How to use "movsum()" with panel data in a table using loop mechanisms?

plus de 7 ans il y a | 2 réponses | 0

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Question

How to calculate Trailing Moving Sums going up vertically in a table?

plus de 7 ans il y a | 1 réponse | 0

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Question

How to use the Percentile Function for Ranking purpose?
*Goal*: For _every date_ calculate lower and upper 20% percentiles and, based on the outcome, create 2 new variables, e.g. '...

plus de 7 ans il y a | 1 réponse | 0

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Question

How to calculate Sums in a Panel Data framework using "For Loops"
The following table consists of *Price Returns* returns at different *Dates*: <</matlabcentral/answers/uploaded_files/65818/S...

plus de 7 ans il y a | 1 réponse | 0

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Question

Using panel data, how can I create a new table with weekly price data based on a table with daily price data, for every stock?
My current table (dimension 743644 x 3) consists of Column 1 'Ticker' (278 different stock tickers), Column 2 'Date' (daily fo...

presque 8 ans il y a | 1 réponse | 0

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