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How to use global variables inside a function?
First you need to define a variable say x as global global x x=5 Then in the function definition which is using the glo...

7年以上前 | 20

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Return elements unique to either input
Given two numeric inputs a and b, return a row vector that contains the numbers found in only a or only b, but not both. For ex...

7年以上前

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Spot the outlier
All points except for one lie on a line. Which one is the outlier? Example: You are given a list of x-y pairs in a column ...

7年以上前

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Return unique values without sorting
If the input vector A is [42 1 1], the output value B must be the unique values [42 1] The *values of B are in the s...

7年以上前

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Find the largest value in the 3D matrix
Given a 3D matrix A, find the largest value. Example >> A = 1:9; >> A = reshape(A,[3 1 3]); >> islargest(A) a...

7年以上前

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Specific Element Count
Given a vector _v_ and a element _e_, return the number of occurrences of _e_ in _v_. Note: NaNs are equal and there may be n...

7年以上前

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Check if number exists in vector
Return 1 if number _a_ exists in vector _b_ otherwise return 0. a = 3; b = [1,2,4]; Returns 0. a = 3; b = [1,...

7年以上前

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How many trades represent all the profit?
Given a list of results from trades made: [1 3 -4 2 -1 2 3] We can add them up to see this series of trades made a profit ...

7年以上前

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Not enough input arguments
The code you have written is correct all that you need to do is to define the variable P after you have defined the value of A,B...

7年以上前 | 0

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Generate N equally spaced intervals between -L and L
Given N and L, return a list of numbers (in ascending order) that divides the interval [-L L] into N equal-length segments. F...

7年以上前

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Find a subset that divides the vector into equal halves
Given a vector x, return the indices to elements that will sum to exactly half of the sum of all elements. Example: Inpu...

7年以上前

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How to solve x^4-p*x+q.solve for x considering p and q as constants
Here is a better way to implement when you only have the equation given syms x %define the value of p and q y=x^4-p*x+q;...

7年以上前 | 0

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How to set domain for p(x)/q(x) functions?
You could just use this simple code instead syms x y=(x-1)/(x-2) ezplot(y)

7年以上前 | 0

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How to plot this equation in 3D?
You could use the following code syms x y z = ((1/x)^2 +y^2)^(1/2) ezsurf(z)

7年以上前 | 0

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Find the peak 3n+1 sequence value
A Collatz sequence is the sequence where, for a given number n, the next number in the sequence is either n/2 if the number is e...

7年以上前

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Return the Fibonacci Sequence
Write a code which returns the Fibonacci Sequence such that the largest value in the sequence is less than the input integer N. ...

7年以上前

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Which values occur exactly three times?
Return a list of all values (sorted smallest to largest) that appear exactly three times in the input vector x. So if x = [1 2...

7年以上前

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Interpolator
You have a two vectors, a and b. They are monotonic and the same length. Given a value, va, where va is between a(1) and a(end...

7年以上前

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Maximum running product for a string of numbers
Given a string s representing a list of numbers, find the five consecutive numbers that multiply to form the largest number. Spe...

7年以上前

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How to solve the following equations for vc(t)?
Try the following syms t; T=((vc-Vin)/Rc)*Tsw/2*1/(1.5*Il-0.5*Ipo); vc=(291*cos((6339586188837495*t)/137438953472)*exp(-...

7年以上前 | 1

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How long is the longest prime diagonal?
Stanislaw Ulam once observed that if the counting numbers are <http://en.wikipedia.org/wiki/Ulam_spiral arranged in a spiral>, t...

7年以上前

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Failure in initial objective function evaluation. FSOLVE cannot continue
I guess the mistake you are making is in using Tee = x(1); Cee = x(2); Rather it should be Tee = x0(1); Cee = x0(2)...

7年以上前 | 0

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Alternating sum
Given vector x, calculate the alternating sum y = x(1) - x(2) + x(3) - x(4) + ...

7年以上前

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Replace NaNs with the number that appears to its left in the row.
Replace NaNs with the number that appears to its left in the row. If there are more than one consecutive NaNs, they should all ...

7年以上前

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Remove any row in which a NaN appears
Given the matrix A, return B in which all the rows that have one or more <http://www.mathworks.com/help/techdoc/ref/nan.html NaN...

7年以上前

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Y(n)=5x(n-5)-3x(n 4)
I guess this is probably what you are looking for syms x n x(n)={1,2,3,4,5,6,7,6,5,4,3,2,1} x1(n)=5*x(n-5)-3*x(n+4) x...

7年以上前 | 0

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MATLAB program to find the roots of an equation
Instead of using fsolve try using vpasolve syms x c=0.2:0.1:2; y=cos(x)-c*x; for i=1:numel(y) sol(i)=vpasolve(y(i),...

7年以上前 | 1

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Find the longest sequence of 1's in a binary sequence.
Given a string such as s = '011110010000000100010111' find the length of the longest string of consecutive 1's. In this examp...

7年以上前

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Reverse Run-Length Encoder
Given a "counting sequence" vector x, construct the original sequence y. A counting sequence is formed by "counting" the entrie...

7年以上前

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Trimming Spaces
Given a string, remove all leading and trailing spaces (where space is defined as ASCII 32). Input a = ' singular value deco...

7年以上前