已解决

Find Logic 6

4 years 前

已回答
How to delete last characters of a string
What happens if you replace name = "Motor 315S-4" with name = 'Motor 315S-4' and try name2 = name(1:end-2)? Based off this...

4 years 前 | 1

| 已接受

已回答
Finding multiple x values in plot for given y
I think you want fsolve. Give it a function handle and an initial starting point, and it'll tell you (approximately) what x give...

4 years 前 | 0

已回答
subtract two matrices of sizes [1*5] and [3*5]
Well I typed m = [1 2 3 4 5]; y = [10 11 12 13 14; 9 8 7 6 5; 15 16 17 18 19]; y-m into my matlab command window, and it re...

4 years 前 | 1

已回答
Why am I receiving the error "Array indices must be positive integers or logical values."
Line 26: Array indices must be positive integers or logical values. i is used as an index, but it isn't defined until a line lat...

4 years 前 | 0

已解决

Find Logic 14

4 years 前

已回答
Undefined function 'mtimes' for input arguments of type 'function_handle'.
Your function fonk takes f as an input. f must be a function handle in order to satisfy the quad requirements. Later, you set h=...

4 years 前 | 0

已回答
transform data from hourly to quarter hourly
https://uk.mathworks.com/help/matlab/ref/interp1.html The vector x can be datetime values.

4 years 前 | 1

| 已接受

已回答
How do I write a sparse matrix in MATLAB
https://uk.mathworks.com/help/matlab/ref/full.html

4 years 前 | 2

已回答
How to change x-axis values?
This was the top result when I googled "matlab remove scientific notation axis". From R2015b onwards, ax = gca; ax.XRuler.E...

4 years 前 | 0

已回答
The way to integrate a differentiated function(微分した関数を積分する方法)
Well the integral of a derivative is simply the function itself. For example: y(x) = x^2 + x + 5 dy/dx = 2x + 1 integral(dy/d...

4 years 前 | 0

已回答
Adding noise to my data set
randn is a uniformly distributed random variable with mean of zero and standard deviation of 1. To get what you want, use vari...

4 years 前 | 0

| 已接受

已回答
How to find the index of the first and last non-zero value of a vector ?
The built in command find sounds like what you need. The code could look something like f = ...0,0,0,0,0,0,0,0,5,6,7,4,3,5,6,7,...

4 years 前 | 0

| 已接受

已回答
Unrecognized function or variable
Sya is defined in the code body, but not in the function. Read up on the scope of a Matlab variable for more information. To fi...

4 years 前 | 0

| 已接受

已回答
When i try this sym('x')^y i get an error message
I haven't used the symbolic toolbox before, but when I type 18008617784390347685963^60322355516214665580 into my Matlab commandl...

4 years 前 | 0

提问

How do I iterate over vector elements, but ignore elements which do not meet a condition?
I have a piece of code, which I'm trying to make run faster. I've used the profiler and most of the time is spent on the followi...

4 years 前 | 3 个回答 | 0

3

个回答

已回答
1x4 times 4x4 matrix in Matlab
Use the rules for matrix multiplication to help you. What solved one persons problem won't always solve yours. A 4x4 multiplied...

4 years 前 | 0

已回答
How to fix a matrix error
A (and consequently, L, D and U) is a 16x16 matrix. b is a 1x17 matrix. To fix this, either make A one bigger in each dimension,...

4 years 前 | 0

| 已接受

已解决

Side of a rhombus
If a rhombus has diagonals of length x and x+1, then what is the length of its side, y? <<https://imgur.com/x6hT6mm.png>> ...

4 years 前

已解决

Length of a short side
Calculate the length of the short side, a, of a right-angled triangle with hypotenuse of length c, and other short side of lengt...

4 years 前

已回答
I have successfully detected skin color but not able to understand the working of find function in it.
It's tricky to say when we can't run the code, but I'll give it my best shot. It seems like the code imports an image. The imag...

4 years 前 | 0

已回答
Matlab doesn;t recognise a variable when I run the program
Your if statements aren't working because you're comparing a vector (x) to a scalar 0, L/2 or L. Instead what I think you're try...

4 years 前 | 0

| 已接受

已回答
Error bars are automatically offset. they look correct just the error bar for any point should be located at the point before it
The scatter plot is plot(t, d40avg). The Error bar plot is plot(d40avg, d40std). At first glance it may look like the erro...

4 years 前 | 0

| 已接受

已回答
Keep on getting 'Error using plot, Vectors must be the same length'. How can I plot it correctly?
When the while loop breaks, you have defined T to have length of i_max, and t has length i_max+1. This is because of the line ...

4 years 前 | 0

| 已接受

提问

What determines the increase in speed for parfor vs. for?
The question is simply that. I know that for some loops with a lot of overhead, it can be slower. In some cases, it can be faste...

4 years 前 | 0 个回答 | 0

0

个回答

提问

How do I efficiently iterate over subvectors of a given vector?
I have a vector of length N, which I want to generate all possible subvectors of of length n and sum over the subvectors. At the...

4 years 前 | 1 个回答 | 0

1

个回答

已回答
Function that should be continuous isn't continuously plotted?
At the origin, x and y are both zero, so the denominator of your function is undefined. For me it's returning NaN at the central...

4 years 前 | 1

已解决

radius of a spherical planet
You just measured its surface area, that is the input.

4 years 前

已解决

Given a square and a circle, please decide whether the square covers more area.
You know the side of a square and the diameter of a circle, please decide whether the square covers more area.

4 years 前

已解决

Pi Estimate 1
Estimate Pi as described in the following link: <http://www.people.virginia.edu/~teh1m/cody/Pi_estimation1.pdf>

4 years 前