Meg Noah

Last seen: 3 days ago

179 total contributions since 2016

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Submitted

SKYLAB
Propagate the July 4, 1979 Skylab TLE to its July 11, 1979 re-entry and crash on Earth.

3 months ago | 5 downloads |

Answered
RKF method for second order ODE
https://ntrs.nasa.gov/citations/19690021375 Low-order classical Runge-Kutta formulas with stepsize control and their applicatio...

3 months ago | 0

Answered
RKF method for second order ODE
https://ntrs.nasa.gov/citations/19680027281 Classical Fifth-, Sixth-, Seventh-, and Eighth-Order Runge-Kutta Formulas with Step...

3 months ago | 0

Submitted

Restful Fortune Cookie
Gets a fortune cookie statement every 10 seconds and updates your cookie paper.

8 months ago | 1 download |

Submitted

Image Texture for Region Classification
Graylevel images can be segmented, characterized by their local texture.

9 months ago | 6 downloads |

Submitted

NASA Earthshots Image Getter
Demonstrates how to download NASA Earthshots data with RESTful get.

9 months ago | 1 download |

Submitted

Excel Macro Example: Sun Rise, Set, Transit, Twilight
to demonstrate writing inputs and reading outputs from an xlsm spreadsheet

1 year ago | 3 downloads |

Answered
Plotting stacked graphs with diff x-axis together without any gap
I have an example here: https://www.mathworks.com/matlabcentral/fileexchange/70172-space-weather-data-solar-flux-10-7-cm

1 year ago | 0

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Answered
How to convert euler angle(roll pitch yaw) to position(x,y,z)
Position is a separate measurement from roll, pitch, yaw. Position is the location of the entity, such as an aircraft. Typical...

1 year ago | 0

Answered
How to write a function for a certain number of random numbers
If the numbers are supposed to be uniformly distributed, then they are between 0 and 1. So just linearly scale the value 0 to th...

1 year ago | 0

Answered
Hurst exponent in matlab
Here's one way, but you'll have to change it to have pixels as length dimensions: %% *fractalDimension* %% *definition* funct...

1 year ago | 1

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Answered
Initializing multidimensional array and dynamic expansion
If you know the size you want: A = zeros(nrow,ncol); or A = zeros(nrow, ncol1, ncol2,ncol3); etc. Can also initialize to a...

1 year ago | 1

Answered
how to find index of each occurrence of my pattern in a file
This solution will find the lines that contain the whole phrase. The example illustrates how to consider or not consider the cas...

1 year ago | 0

Question

How can uicontrol be used to make an editable dropdown (eg combobox) control?
I'd like to use the uicontrol of matlab and its arguments rather than the uidropdown. But I want the uidropdown functionality o...

1 year ago | 2 answers | 0

2

answers

Answered
How to reverse the order of words in string
There's undoubetly better solutions, but: strtrim(strrep(cell2mat([flipud(split('Hello. I. am. Here.'))']),'.','. '))

1 year ago | 1

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Answered
How to change interval unit of x axis
Here's one way You can do shape downsampling - reshape then sum the lines. I made some data by digitizing yoour plot. It's att...

1 year ago | 0

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Answered
Loading multiple images, taking mean of them and subtracting background
change the .png for whatever file extension you are using. Are your image greyscale? If not, it might not make sense to backg...

1 year ago | 0

Answered
Alternating up and down in my script to find path through 'maze'
Try this algorithm: Goal:to assign a label to each connected track of 1's on a background of 0's. Procedure: Scan image left t...

1 year ago | 0

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Submitted

Asteroid, Baseball, etc. (obj mesh) Projected Surface Area
Calculate the projected area into wind axes for an obj (wavefront) that is a convex hull.

1 year ago | 6 downloads |

Answered
How to filter data by date?
My suggestion is to convert all your times to an new variable of time in matlab's datenum format. A datenum is the number of da...

1 year ago | 0

Answered
Plotting a smooth curve
First, I added a header to the xlsx file so readtable can be used properly. myData = readtable('Data_help.xlsx'); figure() pl...

1 year ago | 1

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Answered
Errors with my code
You redefined y to zero it out and at a different dimension than t. Also some typos in the annotation. T1=[0:0.001:2]; Y1=(-1...

1 year ago | 0

Answered
Fourrier transform on image
Here's an example - the grid of features is space every 20 meters, the frequency found at 0.05/m corresponds to the frequency of...

1 year ago | 0

Answered
Axes after 2D fft
Some great online references are in the matlab code. Whenever I post links at the top of an answer, the answer gets flagged as ...

1 year ago | 0

Answered
flip an array with the use of vectors
a=[1 7 5 9 3 2 4 1]; a(3:6) = fliplr(a(3:6));

1 year ago | 0

Answered
readmatrix with numbers and text from .csv file
The problem is your last line has 5 columns. This seems to do what you're asking, and hopefully will be enough to get you start...

1 year ago | 0

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Answered
How do I get only the HR out of this .csv
If you post the file, or at least the first 20 lines or so, it would be easier to say which command is best to use. Generally, ...

1 year ago | 0

Solved

pressure to dB?
given x ratio of pressure, find corresponding y dB

1 year ago

Solved

Sum of the Matrix Elements
Add up all the elements in a NxM matrix where N signifies the number of the rows and M signifies the number of the columns. E...

1 year ago

Solved

Convert a vector into a number
This is a sub problem related to this problem: <http://www.mathworks.com/matlabcentral/cody/problems/621-cryptomath-addition>...

1 year ago