# Yutaka Yamada

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Generate a vector like 1,2,2,3,3,3,4,4,4,4

Generate a vector like 1,2,2,3,3,3,4,4,4,4 So if n = 3, then return [1 2 2 3 3 3] And if n = 5, then return [1 2 2...

3 years ago

Solved

Create times-tables

At one time or another, we all had to memorize boring times tables. 5 times 5 is 25. 5 times 6 is 30. 12 times 12 is way more th...

3 years ago

Solved

Sum all integers from 1 to 2^n

Given the number x, y must be the summation of all integers from 1 to 2^x. For instance if x=2 then y must be 1+2+3+4=10.

3 years ago

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Triangle Numbers

Triangle numbers are the sums of successive integers. So 6 is a triangle number because 6 = 1 + 2 + 3 which can be displa...

3 years ago

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Length of the hypotenuse

Given short sides of lengths a and b, calculate the length c of the hypotenuse of the right-angled triangle. <<https://i.imgu...

3 years ago

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Magic is simple (for beginners)

Determine for a magic square of order n, the magic sum m. For example m=15 for a magic square of order 3.

3 years ago

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Finding Perfect Squares

Given a vector of numbers, return true if one of the numbers is a square of one of the other numbers. Otherwise return false. E...

3 years ago

Solved

Maximum value in a matrix

Find the maximum value in the given matrix. For example, if A = [1 2 3; 4 7 8; 0 9 1]; then the answer is 9.

3 years ago

Solved

Pizza!

Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

3 years ago

Solved

Find the sum of all the numbers of the input vector

Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

3 years ago

Solved

Make the vector [1 2 3 4 5 6 7 8 9 10]

In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

3 years ago

Solved

Project Euler: Problem 6, Natural numbers, squares and sums.

The sum of the squares of the first ten natural numbers is, 1^2 + 2^2 + ... + 10^2 = 385 The square of the sum of the first ...

3 years ago

Plotting Curves Python: How to include step size

Hi, please try below. import matplotlib.pyplot as plt import numpy as np t = np.arange(-1.2, 1.2, 0.01) x1 = np.exp(t) x2 =...

3 years ago | 2

| accepted

readtable is not reading the time 12:00:00 AM?

Hi, Recentely I've tried similar thing. Please try below code. opts = detectImportOptions('readTime.xlsx'); opts.VariableTyp...

3 years ago | 0

How to read time as string data from excel file

How about the below code if you want to use readtable? opts = detectImportOptions('readTime.xlsx'); opts.VariableTypes = 'date...

3 years ago | 1

| accepted

HYSYS optimisation using MATLAB

Hi, I don't know much about HYSYS. But the below article would be good reference as for the optimization of process simulation. ...

3 years ago | 0

| accepted

Array indices must be positive integers or logical values.

It seems that Elev1 is the initial elevation. I think it's better to get the array size first like below. Otherwise the array s...

3 years ago | 0

| accepted

凡例のフォントを指定する方法

こちらのリンクを見た感じでは、凡例に対して以下のような形で指定できるのではないかと思います。 ご質問の意図と違っているかもしれませんが、試してみていただければと思います。 lgd = legend('a','b','c'); lgd.FontName...

3 years ago | 2

| accepted

Solved

Determine whether a vector is monotonically increasing

Return true if the elements of the input vector increase monotonically (i.e. each element is larger than the previous). Return f...

3 years ago

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:...

3 years ago