Atsushi Ohashi

Last seen: 2 Tage ago

MathWorks

38 total contributions since 2016

I'm pilot engineer in Japan.

Atsushi Ohashi's Badges

Answered
XML構造体配列の複数Fieldの中のそれぞれのField格納されている要素の取得
ご質問の回答そのものではないかもしれませんが、ご懸念はForループの回数が多くなることで実行速度が遅くなることだと思いますので、For文の回数が減る回答とさせてください。 XMLを構造体の形にせず、XMLファイルを読み込んで該当するノードのみを取得し、そ...

24 Tage ago | 0

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Answered
csvreadをMATLAB coderでコード生成するには
fopen, fgetlを使ってCSVファイルを読み込むサンプルになります。 1行ずつファイルからデータを読み込んで、カンマで文字列を分割したあと、数値へ変換しています。下記のコードをMATLAB Coderで実行はできました。C言語でCSVの読み込...

29 Tage ago | 0

Answered
3次元配列を指定した範囲で平均化
brockproc 関数とMean関数を組み合わせる方法があります。 3x3(9要素)のブロックごとにX,Y,Zのそれぞれの平均値を求めます。ステレオ画像で値がなかった画素は数値がNaNになっていると思いますので、平均値を求めるときにNaNは除外します。...

29 Tage ago | 0

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Answered
グラフと写真を合わせる
Line関数で画像上にプロットを描く手段はいかがでしょうか。 BackImName='RectifiedPhotos/Photo3/RectifiedPhoto-H2018-02-17-003.png'; file=csvread('modifiedd...

29 Tage ago | 0

Answered
音声ファイルの無作為抽出について
音声ファイル名を1つのセル配列にまとめ、randi 関数を使ってインデックスを求める方法がございます。 % ファイルをセル配列に格納 cellFiles = {'001.wav', '002.wav', '003.wav'}; % ランダムなインデッ...

etwa ein Monat ago | 0

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Answered
画像を分割し各セグメントの平均値を出したい。
1枚の画像を指定したサイズで分割し、それぞれの分割したブロックごとで処理を実行するには brockproc 関数がご利用になれます。 brockproc 関数ではユーザが指定した関数を指定したサイズで画像を分割したブロックに対して実行することができます。...

etwa ein Monat ago | 0

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Solved

Counting Sequence
Given a vector x, find the "counting sequence" y. A counting sequence is formed by "counting" the entries in a given sequence...

mehr als ein Jahr ago

Solved

Add a block to a model
Produce the following signal: <<http://blogs.mathworks.com/images/seth/cody/add-block-eqn.png>> In this case, the slope of...

mehr als 2 Jahre 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...

fast 3 Jahre ago

Solved

Nearest Numbers
Given a row vector of numbers, find the indices of the two nearest numbers. Examples: [index1 index2] = nearestNumbers([2 5 3...

fast 3 Jahre ago

Solved

Counting Money
Add the numbers given in the cell array of strings. The strings represent amounts of money using this notation: $99,999.99. E...

fast 3 Jahre ago

Solved

Remove the vowels
Remove all the vowels in the given phrase. Example: Input s1 = 'Jack and Jill went up the hill' Output s2 is 'Jck nd Jll wn...

fast 3 Jahre ago

Solved

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...

fast 3 Jahre ago

Solved

Return the 3n+1 sequence for n
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...

fast 3 Jahre ago

Solved

Bullseye Matrix
Given n (always odd), return output a that has concentric rings of the numbers 1 through (n+1)/2 around the center point. Exampl...

fast 3 Jahre ago

Solved

Function Iterator
Given a handle fh to a function which takes a scalar input and returns a scalar output and an integer n >= 1, return a handle f...

fast 3 Jahre ago

Solved

Summing digits
Given n, find the sum of the digits that make up 2^n. Example: Input n = 7 Output b = 11 since 2^7 = 128, and 1 + ...

fast 3 Jahre ago

Solved

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...

fast 3 Jahre ago

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Return the largest number that is adjacent to a zero
This example comes from Steve Eddins' blog: <http://blogs.mathworks.com/steve/2009/05/27/learning-lessons-from-a-one-liner/ Lear...

fast 3 Jahre ago

Solved

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...

fast 3 Jahre ago

Solved

Swap the first and last columns
Flip the outermost columns of matrix A, so that the first column becomes the last and the last column becomes the first. All oth...

fast 3 Jahre ago

Solved

Find the numeric mean of the prime numbers in a matrix.
There will always be at least one prime in the matrix. Example: Input in = [ 8 3 5 9 ] Output out is 4...

etwa 3 Jahre ago

Solved

Find all elements less than 0 or greater than 10 and replace them with NaN
Given an input vector x, find all elements of x less than 0 or greater than 10 and replace them with NaN. Example: Input ...

etwa 3 Jahre ago

Solved

Remove all the consonants
Remove all the consonants in the given phrase. Example: Input s1 = 'Jack and Jill went up the hill'; Output s2 is 'a ...

etwa 3 Jahre ago

Solved

Fibonacci sequence
Calculate the nth Fibonacci number. Given n, return f where f = fib(n) and f(1) = 1, f(2) = 1, f(3) = 2, ... Examples: Inpu...

etwa 3 Jahre ago

Solved

Back and Forth Rows
Given a number n, create an n-by-n matrix in which the integers from 1 to n^2 wind back and forth along the rows as shown in the...

etwa 3 Jahre ago

Solved

Determine if input is odd
Given the input n, return true if n is odd or false if n is even.

etwa 3 Jahre ago

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...

etwa 3 Jahre ago

Solved

Who Has the Most Change?
You have a matrix for which each row is a person and the columns represent the number of quarters, nickels, dimes, and pennies t...

etwa 3 Jahre ago

Solved

Add two numbers
Given a and b, return the sum a+b in c.

etwa 3 Jahre ago