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Charles


University College London

Actif depuis 2017

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Question


How do I convert a table to .csv format
I have the follwing code, and i wish to convert a table to a .csv format and not a .txt as this code does. The inputfile is a nu...

plus de 5 ans il y a | 1 réponse | 0

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Question


Finding peak (highest price), trough (lowest price), and average distance between peak and trough for a series of prices
I have a n x m cell array of prices. I use the code below to find the highest price, the lowest price, and the percentile rang...

presque 6 ans il y a | 1 réponse | 0

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Question


use workspace variables as input to generate multiple text file outputs
I have n workspace variables which all happen to be tables. The following script takes one such variable for example GPB_USD as...

presque 6 ans il y a | 1 réponse | 0

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Question


remove table header row
I have the attached table which I wish to 1) Remove the header row. 2) duplicate the second column and append to end, making...

presque 6 ans il y a | 1 réponse | 0

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Question


horizontal concatenate a datetime structure to a table array
Hi I am trying to place a datetime array next to a table array I am trying the follwing but getting an error. Once they...

presque 6 ans il y a | 2 réponses | 0

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réponses

Question


date and time format change
i have a cell n x 2 table array. The first column containd dateas in the format of 'yyyy-MM-dd''T''HH:mm:ss.SSSSSSSSS''Z''' ...

presque 6 ans il y a | 1 réponse | 0

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Question


Indexing into a m x n array to find values using an array of row and column indices
I have a cell array A. and marrix B A = [2,4,0.5,0.34;0.01,4,0.5,0.34;10,4,0.2,0.6;10,4,0.2,0.6;19,15,0.7,0.6] B = [1,1;1,2;2,...

presque 6 ans il y a | 1 réponse | 0

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Question


return row index of values greater than 0 to a 3 dimensional array
I have a Matrix A, of m x n dimensions. I wish to go through each row from left to right and return the index of values greater...

presque 6 ans il y a | 2 réponses | 0

2

réponses

Question


VORTEX TECHNICAL INDICATOR CODE
I am trying to find some matlab code for the vortex technical indicator

presque 6 ans il y a | 1 réponse | 0

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Question


How to calculate the n period Element difference every in a matrix ?
Hello. I have a matrix A, of size n x m, and second matrix of prices, matrix B same size. I wish to find the difference b...

presque 6 ans il y a | 1 réponse | 0

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Question


How to save each iteration of a loop into the same sheet of an Excel spreadsheet using a mac and the function Mac OSX friendly function xlwrite
How I am trying to write the outputs of each iteration of each loop to the same spreadsheet but in different sheets. Thus ...

plus de 6 ans il y a | 1 réponse | 0

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Question


I want to create a date vector in serial format. I know the end date, but I wish to be able to go lets say n period back from this date in either daily or weekly steps. The end date should be at the bottom of the vector. Any help?
I want to create a date vector in serial format. I know the end date, e.g, 21st June 2018, but I wish to be able to go lets say ...

plus de 6 ans il y a | 1 réponse | 0

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Question


How do Index into a structure array and assign columns to a variable
I have what looks likes a structure array as output. Each cell of the structure array is n x 5. I wish to attract columns 2, 3...

plus de 7 ans il y a | 1 réponse | 0

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Question


can i used cellfun with a function which has more than one input?
Hello I have a function as follows [ chart_datavortex ] = chart_funcv( 'AUD_USD', New_dataopenbidx, New_datahighbidx, New_d...

plus de 7 ans il y a | 1 réponse | 3

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Question


how do I delete a duplicate record from an SQLite database using a MATLAB command
Hi I have an sqlite database with records which can be identified by a datetime string. i have a duplicate entry and which to d...

plus de 7 ans il y a | 1 réponse | 0

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Question


update SQLite database using insert
Hello I am trying to update my SQLite database using the following command insert(conn, 'ClosePriceTable', {'Dates','AUD_CAD...

plus de 7 ans il y a | 1 réponse | 0

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Question


Extract data from a nested structure array
Hi I am new to matlab. I wish to extract data from an structure array. the data is char type and double type. I am using...

plus de 7 ans il y a | 1 réponse | 0

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Question


How do i use the timer function to execute a script at 06:00hrs each day monday through friday
I currently have the following but i want this to occur each day at the same time T1 =timer(TimerFcn','myscriptname') St...

plus de 7 ans il y a | 2 réponses | 0

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réponses

Question


why does Matlab return ' expression to the left of the equals sign is not a valid target'
I am using MATLAB 2017a and Python 3.6 I am trying to call a Python script from within the MATLAB window and assign the returned...

plus de 7 ans il y a | 2 réponses | 0

2

réponses

Question


How do I pull data from an SQLite daatbase into Matlab workspace
Hi I have somehow managed to put together some python code to retrieve data in an SQL lite database, I know which to pull that ...

plus de 7 ans il y a | 1 réponse | 0

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Question


updating an sql lite database on my macbook delete and insert
Hi I wish to update an SQL Lite database file in Matlab on my macbook I understand sql lite has limitations. The replace funct...

plus de 7 ans il y a | 1 réponse | 0

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Question


How can my Matlab script read streamed data from my Python script
I have created a script in Python which streams live data to my terminal on my Macbook. I am suing Python 3.6. At this point I m...

plus de 7 ans il y a | 1 réponse | 0

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Question


Neural Network (NARX) performance interpretation - how small is small?
I have built a neural network to forecast currency pair prices (trend) a few steps ahead. How do I interpret the performance pl...

plus de 7 ans il y a | 1 réponse | 0

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Question


Neural Network for Currency Forecast - How do I stop it from repeatedly training after I am happy with my NN performance?
I have read a few papers on using a Neural Network to forecast a few periods ahead the price or trend in a Currency pair. I hav...

plus de 7 ans il y a | 1 réponse | 0

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Question


what are NARX Function inputs "X" and "Xi"? Whats is an example of both?
Allow me to preface I am somewhat new to Matlab, and Neural Networks. Despite this I have created a NARX function to predict mul...

plus de 7 ans il y a | 1 réponse | 0

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Question


Factoran and postive definite matrix
I wish to perform some factor analysis on my portfolio I have a matrix of returns and wish to use the factoran function to deriv...

environ 8 ans il y a | 1 réponse | 0

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