# Shayma Al Ali

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**Content Feed**

Question

H5read Error?

I keep getting this error when trying to read some variables from a few h5 files. The error I get is: Error using h5readc The ...

2 months ago | 0 answers | 0

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answersQuestion

Getting error that output argument is not assigned during function when it is?

I have a function that finds wind speeds between certain lats and lons. This is the first line in my function: function [d,ccm...

2 months ago | 1 answer | 0

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answerQuestion

How to get the indices from a matrix and apply it to vectors?

I have a matrix of wind speeds that is 80 x 160. I also have vectors of latitudes (80x1) and longitudes (160x1). I want to be ab...

2 months ago | 1 answer | 0

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answerQuestion

Scattered points not plotting on top of pcolorm?

I want to make a plot of wind speeds as a colormap and then plot points on top of the colormap that shows the trajectory of a sa...

2 months ago | 0 answers | 0

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answersQuestion

Interpolation is wrong?

Hi everyone! I have a variable, 'wc_average' that I'd like to interpolate so it's the same size as another variable 'dep_cal20...

2 months ago | 2 answers | 0

### 2

answersQuestion

How to download files online using Matlab?

I need to download many (like hundreds or thousands) of HDF files from an online database. What functions can I use so I can con...

2 months ago | 1 answer | 0

### 1

answerQuestion

Convert from Coordinated UTC to datetime?

I have a list of times formatted in coordinated UTC time. For example, the first data entry point I have is 1.511092230713565e+...

2 months ago | 2 answers | 0

### 2

answersQuestion

Inverse of matrix is wrong?

I have a 583x583 matrix called "F". I am trying to use F to get a variable X for an equation FX=B. However, when I solve for X, ...

3 months ago | 1 answer | 0

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answerQuestion

How to create a matrix where the value shifts to the write with each row? And how do I create a vector that increases and then decreases?

I need to make a square matrix that is 583x583. With every row, the values shift to the right and the values shift to the right ...

3 months ago | 1 answer | 0

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answerQuestion

How to find the common dates between two different variables that are not the same size or format?

I have two different datetime arrays: dt which is (14782x1) and dt2 which is (47370x1). The formats between the two variables ar...

3 months ago | 2 answers | 0

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answersQuestion

How to move decimal to the right?

I have a time variable that is supposed to formatted as yymmdd.xxxx where xxxx is the fraction of the day. However, the variable...

4 months ago | 0 answers | 0

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answersQuestion

How do I select data based on multiple indexes?

I have a data set called 'total_backscatternight'. I have three flags, 'water_data','Perp_saturationdata','Par_saturationdata', ...

4 months ago | 1 answer | 0

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answerQuestion

How do I sort data based on another variable?

One variable, b_dp, is dependent on another variable, b_lat which is the latitude the data b_dp was taken at. I know they are no...

4 months ago | 1 answer | 0

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answerQuestion

How to find rows in table based on multiple criteria?

I have a table called shipdatatable that is 625x7. I want to select data in the table based on multiple criteria, specifically t...

5 months ago | 1 answer | 0

### 1

answerQuestion

Error with interp1?

I have a variable, u10_B1B3, that is 851x1. I want it to be the same length as another variable, wc_B1B3, which is 7414x1, so I ...

5 months ago | 1 answer | 0

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answerQuestion

How to average data within bins when values are not integers?

I'm analyzing whitecaps, named 'wc_average', against wind speed ('new_u10wcav'). I want to bin the windspeeds and average the wh...

10 months ago | 1 answer | 1

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answerQuestion

Why am I getting the error that the 'dimensions of arrays concatenated are not consistent'?

I have a list of DOY numbers that also contain the hours and minutes that I want to convert to datetime. The variable is DOYfilt...

12 months ago | 1 answer | 0

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answerQuestion

Length of variable is much shorter during a loop?

I have a variable 'DOYfilt' that has a sizw 1408x1 double. It contains datenums so I have a for loop to convert it to datestring...

12 months ago | 1 answer | 0

### 1

answerQuestion

How do I convert a date time format that's (dd-MMM-yyyy hh:mm:ss) to (dd-MMM-yyyy hh)?

I'm having trouble converting a datetime column thats in the format (dd-MMM-yyyy hh:mm:ss) to (dd-MMM-yyyy hh), so basically jus...

12 months ago | 1 answer | 0

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answerQuestion

Error with matrix multiplication?

I have two matrices I'd like to multiply. Matrix A has dimensions 107x817. Matrix B has dimensions 817x1. My understanding of ma...

1 year ago | 2 answers | 0

### 2

answersQuestion

How to select rows in a matrix with a for loop?

I have a 3061x107 matrix. I want to reduce it to a 817x107 matrix. My current code currently saves what I want as a new matrix i...

1 year ago | 1 answer | 0

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answerQuestion

Extrapolate values for a variable that is dependent on three other variables?

I have data downloaded for three variables: Temperature (85x1) Salinity (85x1) Pressure (85x1) I use the three variables to ...

1 year ago | 1 answer | 0

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answerQuestion

Error message for extrapolation?

I keep getting an error message when using the interp1 function. For some background, I have 107 files that all have the same va...

1 year ago | 1 answer | 0

### 1

answerQuestion

How. do I combine variables into one Matrix?

I have about 25 stations with the same variable. I want to extract the variable from each file and combine them into one matrix...

1 year ago | 1 answer | 0

### 1

answerQuestion

How do I reinterpolate density into uniform depth values?

I have density values from ~245 files from hydrographic data. So each file contains a list of density values with depth. I want ...

1 year ago | 1 answer | 0

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answerQuestion

Calculate pressure gradient between two areas?

So I have two variables, zonal1 and zonal2. Each variable contains a list of latitude, longitude, and pressures. I need to calcu...

1 year ago | 0 answers | 0

### 0

answersQuestion

How to solve error "Index exceeds matrix dimensions" when reading netcdf file?

I'm trying to import some variables from a netcdf file. The variable "wind speed" has dimensions of 1x1x42456 or lat xlon x time...

1 year ago | 1 answer | 0

### 1

answerQuestion

Find percent difference between 2 columns in variable?

So I have a variable, x, that has a size of 300x2. It calculates the fraction of an image that is white, and therefore it produc...

2 years ago | 1 answer | 0

### 1

answerQuestion

How do I get the date out of a filename using regexp?

Currently, I have a list of files that are saved as the following 'xxx_2014_06_03_00_00_01'. I'd like to extract the date in the...

2 years ago | 3 answers | 0

### 3

answersQuestion

How to get rid of '._' files on a hard disk?

Hello everyone! I'm working on analyzing some images with a code, and all my files and matlab codes are running on an external ...

2 years ago | 2 answers | 0