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Iris Li


Last seen: nästan 4 år ago |  Active since 2018

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How to save all results at some point in the script and run next time based on those results?
I mean I don't need to change the first half of my code. Every time running the script I only change some lines in the last part...

mer än 6 år ago | 1 answer | 0

1

answer

Question


How could I find significant coefficients?
Say I did hundreds of regressions based on grouped data from one table, and then got 100 rows of Coefficients C = (alpha0; alpha...

mer än 6 år ago | 0 answers | 0

0

answers

Question


how to delete rows with some repeated elements?
for example I need to delete one out of two rows whose numbers in column 1&2 are the same. At the same time the deleted row shou...

mer än 6 år ago | 1 answer | 0

1

answer

Question


How to use if command？
Say I have a table X = (columnA, columnB, columnC) What is wrong with the following command? The result is always columnB = colu...

mer än 6 år ago | 1 answer | 0

1

answer

Question


Plotting in groups by two variables?
1.How should I plot strike_price to mid_value grouped by date and by maturity? i.e. I would like to get 4 plots with label "date...

mer än 6 år ago | 0 answers | 0

0

answers

Question


Transform a cell of arrays to a table?
How could I get B from A? Thanks!!! The cell2table command couldn't because the element in A is {[1;2;3]}, instead of {[...

mer än 6 år ago | 1 answer | 0

1

answer

Question


How to extract rows by date?
say I have a table A 18-Dec-2015 42.3000 29.9000 7.3000 18-Dec-2015 37.3000 30.1000 13.4000 18-Dec-2015 39...

mer än 6 år ago | 2 answers | 0

2

answers

Question


How to merge two tables when the key variables are not common?
I have two tables A and B with key variables. Most variables are the same. A = [X,Y,K; 100,200,1; 300,400,2; ...

mer än 6 år ago | 1 answer | 0

1

answer

Answered
How to fit a quadratic function using the "minimizing the volume-weighted mean squared error"?
Thanks you two! I made some silly comments but learned a lot. :)

mer än 6 år ago | 0

Question


How to fit a quadratic function using the "minimizing the volume-weighted mean squared error"?
Say I have a function *y = a + b*x + c*x.^2* and I got matrixes *x and y*, and the weight *w*. Estimate the parameters ( ...

mer än 6 år ago | 2 answers | 0

2

answers