ConvertFrom在MATLAB怎么用
时间: 2024-05-11 16:14:14 浏览: 17
在MATLAB中,可以使用`convertfrom`函数将字符串、字符向量、数值数组或逻辑数组转换成指定类型的数组。该函数的语法如下:
```
A = convertfrom(typestr, X)
```
其中,`typestr`为要转换成的类型,包括`'double'`、`'single'`、`'int8'`、`'uint8'`、`'int16'`、`'uint16'`、`'int32'`、`'uint32'`、`'int64'`、`'uint64'`、`'logical'`、`'char'`等。`X`为要转换的数据,可以是字符串、字符向量、数值数组或逻辑数组。
例如,将字符串转换成数值数组:
```
str = '1 2 3 4 5';
A = convertfrom('double', str)
```
输出结果为:
```
A =
1 2 3 4 5
```
将逻辑数组转换成双精度数值数组:
```
B = [true false true; false true false];
A = convertfrom('double', B)
```
输出结果为:
```
A =
1 0 1
0 1 0
```
相关问题
matlab datetime convertfrom
To convert a datetime to a specific format in MATLAB, you can use the `datetime` function with the `format` argument. Here's an example:
```matlab
dt = datetime('2022-09-25 10:30:00');
str = datestr(dt, 'yyyy-mm-dd HH:MM:SS');
disp(str);
```
In this example, the `datetime` function is used to create a datetime object for September 25, 2022, at 10:30 AM. The `datestr` function is then used to convert the datetime object to a string representation in the format 'yyyy-mm-dd HH:MM:SS'. The resulting string is then displayed using the `disp` function.
You can modify the format string to match your desired output format. You can find more information about the format specifiers in the MATLAB documentation for the `datestr` function.
视频hsv转rgb用matlab
可以使用以下代码将视频的HSV转换为RGB:
vidObj = VideoReader('exampleVideo.avi');
vidWidth = vidObj.Width;
vidHeight = vidObj.Height;
numFrames = vidObj.NumberOfFrames;
% Preallocate movie structure.
mov(1:numFrames) = struct('cdata', zeros(vidHeight, vidWidth, 3, 'uint8'),'colormap', []);
% Read one frame at a time.
for k = 1 : numFrames
mov(k).cdata = read(vidObj, k);
% Convert the frame from HSV to RGB.
mov(k).cdata = hsv2rgb(mov(k).cdata);
end
% Play back the movie once at the video's frame rate.
movie(mov, 1, vidObj.FrameRate);
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