matlab常用算法的代码
时间: 2023-08-16 19:10:12 浏览: 43
以下是一些常见算法的 MATLAB 代码:
1. 冒泡排序
```
function sorted_array = bubble_sort(unsorted_array)
n = length(unsorted_array);
for i = 1:n-1
for j = 1:n-i
if unsorted_array(j) > unsorted_array(j+1)
temp = unsorted_array(j);
unsorted_array(j) = unsorted_array(j+1);
unsorted_array(j+1) = temp;
end
end
end
sorted_array = unsorted_array;
end
```
2. 选择排序
```
function sorted_array = selection_sort(unsorted_array)
n = length(unsorted_array);
for i = 1:n-1
min_index = i;
for j = i+1:n
if unsorted_array(j) < unsorted_array(min_index)
min_index = j;
end
end
temp = unsorted_array(i);
unsorted_array(i) = unsorted_array(min_index);
unsorted_array(min_index) = temp;
end
sorted_array = unsorted_array;
end
```
3. 插入排序
```
function sorted_array = insertion_sort(unsorted_array)
n = length(unsorted_array);
for i = 2:n
current = unsorted_array(i);
j = i-1;
while j >= 1 && current < unsorted_array(j)
unsorted_array(j+1) = unsorted_array(j);
j = j-1;
end
unsorted_array(j+1) = current;
end
sorted_array = unsorted_array;
end
```
4. 快速排序
```
function sorted_array = quick_sort(unsorted_array)
n = length(unsorted_array);
if n <= 1
sorted_array = unsorted_array;
return
end
pivot = unsorted_array(ceil(n/2));
left = [];
middle = [];
right = [];
for i = 1:n
if unsorted_array(i) < pivot
left = [left unsorted_array(i)];
elseif unsorted_array(i) == pivot
middle = [middle unsorted_array(i)];
else
right = [right unsorted_array(i)];
end
end
sorted_array = [quick_sort(left) middle quick_sort(right)];
end
```
5. 归并排序
```
function sorted_array = merge_sort(unsorted_array)
n = length(unsorted_array);
if n <= 1
sorted_array = unsorted_array;
return
end
left = unsorted_array(1:floor(n/2));
right = unsorted_array(floor(n/2)+1:end);
left_sorted = merge_sort(left);
right_sorted = merge_sort(right);
sorted_array = merge(left_sorted, right_sorted);
end
function merged_array = merge(left, right)
merged_array = [];
while ~isempty(left) && ~isempty(right)
if left(1) < right(1)
merged_array = [merged_array left(1)];
left = left(2:end);
else
merged_array = [merged_array right(1)];
right = right(2:end);
end
end
merged_array = [merged_array left right];
end
```