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# James

Last seen: 3 dagen ago Active since 2019

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Question

Why doesn't my plot "go to infitnity"?
Probably a silly question, but I couldn't figure out the reason! I have, x = [0.00,0.10,0.19,0.29,0.38,0.48,0.58,0.67,0.77,0.86...

14 dagen ago | 1 answer | 0

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Question

How to Interpolate coordiantes and values of a surface plot
Hi, I have a set of coordinates that creates a mesh - i.e. XYZ coordinates of a set of quadrilateral panels that creates a mesh...

16 dagen ago | 1 answer | 1

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Question

How to sum up multiple cell arrays (column-wise)?
I have a set of data in the form of a 26x32 cell array. Each cell consists a 6x6 matrix. I have attached the dummy file here. H...

17 dagen ago | 1 answer | 0

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Question

Can I change iteration value in following for loop?
Suppose I have the following code. nf1 = 3; nf2 = 4; panel_no = 1:12; R_vx = rand(144,1); for i = 1:nf1 for ii = 1:nf...

ongeveer een maand ago | 1 answer | 0

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Question

Help with storing data in a 4-D double matrix
I have a data set in the form of 8 columns. I have attached a dummy xlsx file to show the data structure. As it can be seen, th...

ongeveer een maand ago | 1 answer | 0

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Question

How to solve a system of coupled, differential equations of motions?
Hi, This follows a previous post that I posted, where I was wrong with formulation and assumptions. I learned the mistake there...

2 maanden ago | 0 answers | 0

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Question

How to solve a system of coupled, non-homogenous differential equations of motions?
Hi, First, I must say that I'm still learning the mathematics behind the governing equations, and I know I have a long way to g...

3 maanden ago | 1 answer | 0

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Question

How to check if two planes intersect with each other?
Suppose I have two planes defined by four points (each) as follows. For ease of explanation, I will follow a graphical approach....

3 maanden ago | 2 answers | 0

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Question

Store mxn matrix within a for loop
How can I store results of a for loop when one iteration gives m x n matrix and not a 1 x n matrix? a = rand(20,12); for k=...

7 maanden ago | 1 answer | 0

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Question

How can I store all outputs from a nested for loop?
I know this might be a common problem, and tried a lot of different answers posted under similar questions. Anyway, here's a bas...

7 maanden ago | 1 answer | 0

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Question

How to replace values of a vector based on the values of another vector?
I have two vectors that together create a cartesian grid, such as this. xmin = 0; xmax = 500; ymin = -200; ymax = 200; c...

bijna 2 jaar ago | 1 answer | 0

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Question

How to set ticks in imagesc colorbar based on a matrix value?
I'm using imagesc to display a graph/image, and I'm having trouble with the piece of code dislpayed here - specifically the tick...

ongeveer 2 jaar ago | 1 answer | 0

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Question

How can I interpolate a datetime data series to have an interval of 1 minute in MATLAB?
Hi everyone, I'm analyzing a sample dataset from a .csv file (Attached). The columns are: "Ref number, MMSI, Latitude, Longitud...

ongeveer 2 jaar ago | 1 answer | 0

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Question

How to create matrices from a table and extract specific data from it to make plots?
I'm sorry if the title is confusing. But I'm stuck at a point and I will appreciate any tip or help! I'm reading a series of AI...

ongeveer 2 jaar ago | 1 answer | 0

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Question

Create matrix from 2 columns of a csv file
A CSV file includes all my data in seperate columns and I'm trying to extract them separately for analysis. I'm using MATLAB R20...

ongeveer 2 jaar ago | 1 answer | 0

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Question

How to implement exponential smoothing for data without a trend/seasonality?
Hi everyone, My data is the form of AIS and I'm only focusing on Speed (SOG - Speed Over Ground) and Course (COG - Course Over ...

ongeveer 2 jaar ago | 0 answers | 0

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Solved

Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

meer dan 2 jaar ago

Question

Solving second order non-linear equations (time-domain)
Hi everyone, Im starting to learn ODE solving using MATLAB. I'm new to this, although I'm fairly comfortable using MATLAB. (I'm...

meer dan 2 jaar ago | 1 answer | 0

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Question

Draw the trail of a moving marker on an animated 2D plot
Hi everyone! So, I'm creating a 2D plot where the marker moves from one point to another (nothing fancy, just pausing the plot)...

meer dan 2 jaar ago | 1 answer | 0

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Question

Contour plot ignores a set of data points
Hello, I'm constructing a contour plot using location (longitude and latitude) and respective depth data. However, the output c...

meer dan 2 jaar ago | 1 answer | 0

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Question

Reverse the Colormap of Surf plot
Hello, I'm constructing a surf plot using Location (logitude, latitude) and depth data. Following image is the 2D projection of...

meer dan 2 jaar ago | 1 answer | 0

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Question

Making the white background of a contour map transparent
Hello, I'm wondering if there is a way to make the white background of a contour map transparent. I want to export a contour ma...

meer dan 2 jaar ago | 0 answers | 0

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Question

Transparency of Image overlay on Google Earth (kmz file)
Hello, My purpose is to obtain a contour map using basic Latitude, Longitude, Height/depth data of a location and overlay the i...

meer dan 2 jaar ago | 1 answer | 0

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Question

Contour map to show ocean depth
Hello, How can I construct a contour map as follows that shows the Ocean depths at a particular location, using Longitude, Lati...

bijna 3 jaar ago | 1 answer | 0

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Question

Contour plot with filled colors (for x, y, z data)
Hello everyone! I have a dataset that contains Latitude, Longitude and depth/height of a particular area. What I want to do is ...

bijna 3 jaar ago | 1 answer | 0

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Question

Plot Bathymetry data on Google Earth using MATLAB
Hi, I have a set of bathymetry data (Latitude, Longitude, Sea depth) and I want to create a contour map using MATLAB with diffe...

bijna 3 jaar ago | 0 answers | 0

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Question

Solve Finite Element Analysis equation
Hi, I'm trying to solve the following FEM equation for 1D unsteady heat conduction using MATLAB. I'm new to FEM and to the math...

bijna 3 jaar ago | 1 answer | 0

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Question

Parse error at '=' and ')' in FEM approach
Hi, Following is my code and it is related to FEM. T = zeros(10,5); T(1:10,1) = 10; T(1:10,5) = 50; T(1,2) = 73; T(1,3) = ...

bijna 3 jaar ago | 0 answers | 0

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Question

Finite Difference Method to find Steady State
Hello, This relates to 1-D unsteady heat conduction using Finite Difference Method (FDM). I have to solve the following equati...

bijna 3 jaar ago | 0 answers | 1