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# Brilliant Purnawan

##### Last seen: 16 days ago
9 total contributions since 2020

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Question

Conditional with time in ode45
Hi, how would you change a variable in a function when 't' in ODE45 reaches a certain value? I have already tried formatting it ...

17 days ago | 2 answers | 0

### 2

Question

Conditional variables with running ODE45
Hi all, is it possible to call variables within an ODE45 and use if statements? So the general idea can be see in the code below...

2 months ago | 1 answer | 0

### 1

Question

ODE45 SIR model problem
Hi, I'm quite new to MATLAB and recently tried to plot a SIR model using its first order equations, but everytime I tried to use...

2 months ago | 1 answer | 0

### 1

Question

Loop an if with different parameters
Hi, doing some practice codings and ran into a snag. So, i'm trying to plot(t,y) with different matrix 'e' values? Let's say my...

2 months ago | 1 answer | 0

### 1

Question

Index in position 2 exceeds array bounds (must not exceed 1). Error can't seem to find the mistake
So I recently tried changing the arrow head visuals through annotations, the following code is a modified one, and everytime I r...

3 months ago | 1 answer | 0

### 1

Question

Unable to format fractions in xticklabels
Hi, so I'm trying to write a fraction in 'xticklabels', I already tried to write $\frac{a}{b}$ but it doesn't seem to work, ...

3 months ago | 1 answer | 0

### 1

Question

Adding velocity directions in phase potrait plot
Hi, need some help regarding adding arrows in velocity plot. So my current plot based on the script extract below yields, the "a...

3 months ago | 0 answers | 0

### 0

Question

Phase plot adding direction arrows
Hi, need some help regarding adding arrows in velocity plot. So my current plot based on the script extract below yields, the "a...

3 months ago | 1 answer | 0