# HWIK

Last seen: 14 days ago Active since 2020

Followers: 0   Following: 0

Chemical engineering student

Programming Languages:
C++

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Error: "The application encountered an unexpected error and needs to close. You may want to try re-installing your product(s). More information can be found at:""
Hi, I'm trying to uninstall a bunch of toolboxes to free up some space on my computer, and when I go to the uninstaller program ...

2 years ago | 1 answer | 0

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draw two curves in matlab
Try this: x=[0:25:200]; y1= [0.4 0.29 0.21 0.19 0.13 0.11 0.09 0.05 0.006]; y2= [0.45 0.27 0.231 0.202 0.12 0.13 0.11 0.062 0...

2 years ago | 0

merge two datetime arrays into one datetime arrays
There might be something more efficient but this should work: dt = datetime(strcat(string(date')," ",string(time')))

2 years ago | 0

Plot an ODE solution with different constant values.
Is this what you are looking for? clear syms y(x) ode = diff(y,x) == (1.5 - 0.8*y) / (0.5 + 0.8*x); sol = dsolve(ode); y1 =...

2 years ago | 0

| accepted

Question

Optimization problem giving inconsistent answers upon changing initial guesses
Hi, I want to solve the following optimization problem from Optimization of Chemical processes: Here is what I have done so...

2 years ago | 1 answer | 0

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Question

Why can't Matlab do the factorial of a non-integer number?
Hi, I tried using the factorial function on a number with decimals and got the following error: N must be an array of real non...

2 years ago | 3 answers | 0

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The graph for the ODE45 function does not work
I think the script where you use ode45 is correct, because I don't see any errors there, and using a different method I get the ...

2 years ago | 0

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Scale on x-axis
Try this: set(gca, 'XTick', 0:0.2:0.8)

2 years ago | 0

Help with odes and two different reactions
Just write a function for the ODEs and feed it to the solver: function out = name_your_function(tspan, inputs) %Get your input...

2 years ago | 0

sym: how to subs two variables
From what you pasted I think you have a symbolic expression not function. I'm guessing you have some values of par1 and par2 a...

2 years ago | 0

differential equations system to be solved on matlab code
This code should work, but you must specify your initial conditions. You might want to look into other ode solvers, as with thes...

2 years ago | 0

MATLAB script to find the angle (in degrees) between two vectorsScrip
This has already been answered here: CosTheta = max(min(dot(u,v)/(norm(u)*norm(v)),1),-1); ThetaInDegrees = real(acosd(CosThet...

2 years ago | 0

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How can I ask Matlab to adjust a parameter in an equation until the answer becomes equal with a predetermined input value?
I'm not sure I quite understand the description but here is my go at it: function Actual_area = call_it_what_you_want(V,ht,Area...

2 years ago | 0

Solving ODE in MATLAB with pre-defined steps
I'm affraid that is not an option, this question was answered pretty clearly in this post. If you want specific points I sugges...

2 years ago | 0

select the correct row in a table with a different index in the for loop
Is this what you are looking for? for i=1:5:1440 j = i==1:5:1440; end Where j would be your new index in sequential orde...

2 years ago | 1

| accepted

How to simultaneously use logical indexing and date time indexing in a timetable?
Not to delete this question, I will answer it with what I found to be the closest to what I wanted through some documentation. ...

2 years ago | 0

| accepted

Question

How to simultaneously use logical indexing and date time indexing in a timetable?
Hi, Let's say I have a timetable with one of the variables being logical indexes, and I want to extract data from this timetabl...

2 years ago | 1 answer | 0

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Question

Bar plot with two axis no plotting as grouped
Hi, I want to plot a bar plot with two axis, and I want the two y vars to be grouped, but they always come out as stacked. I a...

2 years ago | 1 answer | 0

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Question

How to reference previous value in an array without a for loop?
Hi, I have a for loop set up following a similar structure to this: for i=2:size(data,1) data.Var3(i)=interp1(ref_dat...

3 years ago | 1 answer | 0

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Question

How to apply a set of operations to each field in a structured array?
Hi, Lets say I have a structured array with multiple fields in it. Each of those can have more fields or a timetable. I attache...

3 years ago | 0 answers | 0

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Question

How to vertically join differently sized tables?
Hi, Lets say I have two tables: table1=table(1,70,175,29,datetime(1992,7,1),"M",'VariableNames',{'Num','Weight','Height','Age'...

3 years ago | 1 answer | 0

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Question

How to avoid scientific notation in tables?
Hi, I have a table which I want to display (I am displaying it in and app from the Appdesigner), but when I do so I get in some ...

3 years ago | 1 answer | 0

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How to stackplot a table?
Finally figured it out, just reorder the data, I did it like this: load('example.mat') example=table; clear table tstamp=ver...

3 years ago | 0

| accepted

Question

How to stackplot a table?
Hi, I have a table of which I would like to make a stackedplot with each of its variables. I want to set the x axis as a datetim...

3 years ago | 3 answers | 0

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Question

How to make a table with date times and durations?
Hi, I have a set of datetimes and durations, and I want to merge them and display them in a table. I just can't figure out how t...

3 years ago | 2 answers | 0

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Question

How to remove autogenerated legend in stackedplot?
Hi, have the following stackedplot, and if I plot multiple variables in one of the stackedplots I get a legend that looks like t...

3 years ago | 1 answer | 0

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Question

Is it possible to stack axes of different plots in the same figure?
Hi, I am trying to plot some data in Matlab, where the various y axes appear to be sort of stacked on top of eachother, each hav...

3 years ago | 1 answer | 0

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Question

How to store words from a string in a cell array as a multiple strings
Hi, I have a 1x1 cell array containing a string of words: {'Date,Hour,Latitude,Longitude,Windspeed,Pressure'} How would you ...

3 years ago | 1 answer | 0

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Question

Translation of a plot line
Considering an existing figure, would it be possible to vertically translate one of the lines of the plot by a certain amount?

3 years ago | 1 answer | 0