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# Cary

### The Pelican Group

Active since 2014

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Question

In/out signal from vector
Imagine I have the following vector: 0 0 0 0 0 1 1 1 0 0 1 1 1 1 1 0 0 0 1 1 1 1 1 1 The si...

ungefär 6 år ago | 1 answer | 0

### 1

Question

I keep getting the "subscripted assignment dimension mismatch" error. My variables are: ia1=[79;91;94] ia2=[80;103;95] ...

ungefär 6 år ago | 2 answers | 0

### 2

Question

Help with simple probability calculation (loop?)
I have a 2-column matrix that looks like this: 30 1 30 1 30 1 30 1 30 1 29 0 29 ...

mer än 6 år ago | 1 answer | 0

### 1

Question

Struct variables don't save
I have various matrices and I'd like them to be part of a struct. Each matrix is computed on its own, assigned to the struct, th...

mer än 6 år ago | 1 answer | 0

### 1

Question

For loop assignment problem
I have a struct with 85 fields. I want to copy data from the fields into a matrix called "one". Here is my code: one=nan(85...

mer än 6 år ago | 1 answer | 0

### 1

Question

Why is this plot deleted?
As soon as I get to set(gca) the plot disappears. If I continue I get the date formatted tick labels but I don't show any plot. ...

mer än 6 år ago | 1 answer | 0

### 1

Question

For loop combo troubles
I have the following code: When i switches to 2 how can I make j pickup where it last left off (non-nan)? For example, when i is...

mer än 6 år ago | 1 answer | 0

### 1

Question

How can I have a timer continue after an error?
Here is script A: t = timer; t.Period = 10; t.TasksToExecute = inf; t.ExecutionMode = 'fixedRate'; t.TimerFcn =...

mer än 6 år ago | 2 answers | 0

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Question

Use timer to run script every ten seconds
I have a script that I want to execute automatically every ten seconds indefinitely until I tell it to stop. The script is calle...

mer än 6 år ago | 1 answer | 0

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Question

Need consulting on datafeed toolbox/event handling
If there's anyone out there who knows how to operate this thing, please contact me for consulting. No one at Mathworks seems to ...

mer än 6 år ago | 0 answers | 0

### 0

Question

Countdown timer continuously running
I am trying to figure out the best approach to this so I appreciate your thoughts. I'm running a model that uses the number of m...

mer än 6 år ago | 1 answer | 0

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Question

IQFeed - viewing multiple securities simultaneously?
Is this possible? If so IQFeed/Matlab have made it impossible to figure out.

mer än 6 år ago | 0 answers | 0

### 0

Question

I have an RTD datafeed streaming into excel. I want to import this feed into Matlab. As the data from the RTD feed changes, will...

mer än 6 år ago | 0 answers | 0

### 0

Question

Fixing a for loop that's 90% correct
On the first pass through k, everything is fine. But when k=2, x=2, so my subscript index is starting with 2, not 1. If I change...

mer än 6 år ago | 0 answers | 0

### 0

Question

Overcoming 'index exceeds matrix dimensions' without changing methodology of code
This matrix below is a 25x7 matrix. Basically what I'm doing is taking a start date and an end date, and adding 1 to the start d...

mer än 6 år ago | 1 answer | 0

### 1

Question

Creating an efficient for loop
for i = 1:length(startIdx) for j = 1:length(date(startIdx(i):cutoffIdx(i))) k = date(startIdx(i):cutoffIdx(i...

mer än 6 år ago | 1 answer | 0

### 1

Question

Find elements in cell array (logical 0 or 1)
I have a cell column vector of stock symbols that are all three letters long. I need to create a column vector of the same lengt...

nästan 7 år ago | 1 answer | 0

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Question

Union WITH repetitions - indices for both
How can this be achieved? I am trying to index trading days and calendar days so I can match the two together. Here is my code: ...

nästan 7 år ago | 1 answer | 0

### 1

Question

Focus plot and apply correct tick labels
Good Evening Everyone, I'd much rather be asking you about Bayesian analysis over this, but unfortunately, I am terrible with...

nästan 7 år ago | 1 answer | 0

### 1

Question

Trouble with calculating mean of historical data
I wrote a function that calculates the mean price of the last 15 mins of the trading day. In the attached excel file I get a mea...

nästan 7 år ago | 1 answer | 0

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Question

Short function taking 20+ minutes to run
I'm using a Xeon quad-core processor with 64GB of RAM. The program running the function only has 89 data points. It's now been o...

nästan 7 år ago | 1 answer | 0

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Question

How to encompass a half-hour block of time?
The code below finds the index of every timestamp at 3:30. timeStr=cellstr(datestr(time)); timeDbl=datevec(timeStr); ...

nästan 7 år ago | 1 answer | 0

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Question

Find the Monday preceding the third Friday of the month
Ok, I have data spanning numerous years, and part of my analysis requires me to know the Monday that precedes the third Friday o...

nästan 7 år ago | 2 answers | 1

### 2

Find index between two vectors
Thank you Azzi!

nästan 7 år ago | 0

Question

Find index between two vectors
Good Afternoon, I have a matrix of datevecs. So it looks like this: 2015 1 1 14 59 0 2015 1 1 15 0 0 I need to fin...

nästan 7 år ago | 2 answers | 0

### 2

Question

Why won't this for loop move to the next variable?
On the first pass, everything is fine. i = 49, j = 1, k = 1112. On the second pass, i and j move to the next variables (50 and 1...

nästan 7 år ago | 2 answers | 0

### 2

Question

Nested for loop troubles
Hi Everyone, I am having difficulty troubleshooting a nested for loop. Things work fine on the first pass (when i=49) but bre...

nästan 7 år ago | 1 answer | 0

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Question

Financial toolbox required for excel to matlab date conversion?
This blows my mind. I have to import dates from an excel spreadsheet and the only way I can convert them to usable dates is by b...

nästan 7 år ago | 2 answers | 0

### 2

Question

Find index in each column of a matrix using for
Good evening, I am attempting to find the index of the last non-NaN for each column in a matrix. I can't really get it to wor...

nästan 7 år ago | 1 answer | 0