categorical conversion to integer

5 次查看（过去 30 天）
tren
tren 2023-4-27
评论： Walter Roberson 2023-4-28
I have trained a neural network with two classes (0 and 1)
When i input an image of size 256x256 as:
y=classify(net,input)
the output y is categorica (either 0 or 1)l.
When I type cast it int 8
y=cast(y,'int'8)
I ger wrong values. I need values as it is classified by classifier in categorical form (0 as 0, 1 as 1).
Any suggestion?
Thanks

请先登录，再回答此问题。

回答（3 个）

Star Strider
Star Strider 2023-4-27
Ran in:
Perhaps something like this —
y = categorical([0 1])
y = 1×2 categorical array
0 1
y = cellfun(@str2double,categories(y))
y = 2×1
0 1
y = int8(y)
y = 2×1
0 1
.
Walter Roberson
Walter Roberson 2023-4-27
编辑：Walter Roberson 2023-4-28
https://www.mathworks.com/help/matlab/matlab_prog/ordinal-categorical-arrays.html
create an ordinal categorical with valueset 0 and 1. Afterwards you can int8() the labels
  1 个评论
Walter Roberson
Walter Roberson 2023-4-28
Ran in:
uint8() gives back the class number. If you ordered them then you can work on them mathematically.
y = categorical(randi([0 1], 10, 1), [0 1], ["0", "1"])
y = 10×1 categorical array
1 0 1 0 0 1 1 0 0 0
uint8(y) - 1
ans = 10×1
1 0 1 0 0 1 1 0 0 0

请先登录，再进行评论。

Stephen23
Stephen23 2023-4-27
Ran in:
M = categorical([0,1;1,0])
M = 2×2 categorical array
0 1 1 0
X = double(M);
Y = int8(str2double(categories(M)));
Z = Y(X)
Z = 2×2
0 1 1 0

类别

在 Help Center 和 File Exchange 中查找有关 Deep Learning Toolbox 的更多信息

标签

产品


版本

R2017b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by