Paul Shoemaker

MatlabInvesting.com

Last seen: 4 mois il y a | Actif depuis 2016

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Engineer and market investor/trader. Website: MatlabInvesting.com: "Leveraging the Power of Matlab to Profit in the Markets" Providing knowledge articles and community on how to use Matlab for investing purposes. I also have a Matlab toolbox that interfaces directly with TD Ameritrade (and by extension, Thinkorswim) to conduct automated trading strategies.

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How to find the position of the elements of a matrix?
Check out the ind2sub Matlab function. Paul Shoemaker MatlabInvesting.com

plus de 4 ans il y a | 0

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best option for storing metadata associated to each data file
Hello Lilly, If your data really is time-based then you should consider formatting the data to be a timetable, which have Prope...

plus de 4 ans il y a | 1

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mergeStructs
Helper function to merge separate/disparate data structures

plus de 4 ans il y a | 1 téléchargement |

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createCarbonCopy
Reads the contents of the supplied ASCII file(s) and place in a structure

plus de 4 ans il y a | 1 téléchargement |

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dispinline
prints to the command window, like the built-in disp, but unlike disp, it overwrite previous calls to keep printing on a single ...

plus de 4 ans il y a | 1 téléchargement |

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How to use persistent variables inside parfor method of a custom object class?
Hey folks, I ended up going with Walter's first approach using FOR loop with parfeval within, very close to what I posted above...

presque 5 ans il y a | 0

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How to use persistent variables inside parfor method of a custom object class?
Thanks for the great info all around here. To clarify on the use case, here's a bit more about what's going on: An authenticat...

presque 5 ans il y a | 0

Question

How to use persistent variables inside parfor method of a custom object class?
There is a similar entry on using persistent variables with spmd/parfor (https://www.mathworks.com/matlabcentral/answers/233648-...

presque 5 ans il y a | 4 réponses | 2

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Successful webwrite, but empty response/output?
Hey all, Seems like I stumbled into an echo chamber on this topic. I figured out how to get this to work. The solution can be f...

presque 5 ans il y a | 3

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Ways to finesse HTTP HeaderField constraints?
Hey folks, I think I may have fixed the issue. The trick seems to be creating a GenericHeader object, which does not validate s...

presque 5 ans il y a | 5

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Ways to finesse HTTP HeaderField constraints?
Hey folks, Webwrite isn't meeting my needs for POSTing data to a RESTful web service, so I decided to go with the lower level m...

presque 5 ans il y a | 1 réponse | 0

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Successful webwrite, but empty response/output?
Hey everyone, I'm using webwrite to POST stock orders to TD Ameritrade using their API. For this to work, I need to define an a...

presque 5 ans il y a | 1 réponse | 0

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Changing name of structures
Hello Esteban, I agree that the naming of these structures is unfortunate. You would be better off structuring your data like...

presque 6 ans il y a | 0

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Appending data based on same dates
Hello Lee, You might want to convert these two tables to timetables and then combine them using various functions, such as "s...

presque 6 ans il y a | 0

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Detecting new .txt file in a folder how can i read all the files through fileread command
Ahmad, Hard to say exactly what the issue is without having more information, but it looks like your "nameslist" variable is ...

presque 6 ans il y a | 0

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How to convert my Matlab code into an Excel add-in?
Ji Li, I'm not sure about doing an add-in, but have you considered using the Matlab command "xlsread" to read an Excel spread...

presque 6 ans il y a | 0

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Read in files with loop
You could wrap it in a FOR loop and employ the "eval" function. lastn=1; clear clc for idx = 200:25:90...

presque 6 ans il y a | 0

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Rearrange matrix into single row
reshape(b',1,numel(b)) % Note the transpose ('), this is important. Paul Shoemaker http://www.matlabinvesting.com

presque 6 ans il y a | 0

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renameFields
Utility to rename all fields in a structure (or character array) using several different naming conventions.

presque 6 ans il y a | 2 téléchargements |

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scan4errors
Scans folders for Matlab files that have MLINT errors and warnings

environ 6 ans il y a | 1 téléchargement |

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num2cash
Convert numbers to currency arrays

environ 6 ans il y a | 1 téléchargement |

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nnow
Similar to the Matlab built-in "now.m" function, except "nnow.m" returns the time at the New York Stock Exchange (NYSE)

environ 6 ans il y a | 1 téléchargement |

Réponse apportée
Is it possible to run terminal commands from matlab ??
Have you looked at the "system" and "dos" functions in Matlab? It sounds like they might do what you need. Paul Shoemaker ...

plus de 6 ans il y a | 0

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Speed performance: Find all y-vector entries that have the same value in an x-vector of equal length.
If you're trying to avoid a FOR loop you can use arrayfun, although I'm not sure it improves speed. It would look something l...

plus de 6 ans il y a | 0

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How to open multiple folders for processing?
Hema, Since you don't provide more concrete details about your specific circumstances (code, examples, purpose, etc), I will ...

plus de 6 ans il y a | 0

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How can I open GUI in matlab 2014a?
This appears to be a Java problem and may indicate a Java Runtime Environment (JRE) version or installation problem, or maybe an...

plus de 6 ans il y a | 0

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how to detect circle using hough transform for color image?
Have you searched the Matlab File Exchange? <https://www.mathworks.com/matlabcentral/fileexchange/34365-circle-finder This one> ...

plus de 6 ans il y a | 0

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Plotting a function with a given range of values.
X is a vector in this case, so you have to alert Matlab to treat it on a per-element basis with the use of "." before division/m...

plus de 6 ans il y a | 0

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How to access all subdirectorie?
Newer version of Matlab allow dir to operate recursively. Simply modify your original dir call like so: files = dir(['M:' f...

plus de 6 ans il y a | 1

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import only selected row in file data
There are countless options for doing this and your problem appears to be fairly general purpose. Take a look at <https://www.ma...

plus de 6 ans il y a | 0

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