this.subs.push is not a function
时间: 2023-10-10 18:09:01 浏览: 29
这个错误通常意味着你试图在一个非数组对象上使用push方法。请确保你的this.subs是一个数组,如果不是,你需要先初始化它为一个数组,例如:this.subs = []。如果你确定this.subs是一个数组,那么可能是其他代码修改了它的类型或者值,你需要检查这些代码并确定它们是否正确地操作了数组。
相关问题
sympy中F.subs
sympy中的F.subs()是一个方法,用于将表达式中的变量替换为给定的值。它接受一个字典作为参数,其中字典的键是要替换的变量,其对应的值是要替换的新值。
例如,如果我们有以下表达式:
```
x = symbols('x')
expr = x**2 + 2*x + 1
```
我们可以使用F.subs()方法将变量x替换为3:
```
expr.subs({x: 3})
```
这将返回10,因为3的平方是9,加上2乘以3再加1等于10。
subsasgn Assign fields of a neural network.
In MATLAB, you can assign fields of a neural network using the `subsasgn` function. The `subsasgn` function allows you to modify or assign values to specific fields of an object, such as a neural network.
Here's an example of how you can use `subsasgn` to assign fields of a neural network:
```matlab
net = feedforwardnet([10 5]); % Create a feedforward neural network
% Assign a new value to the 'trainFcn' field of the network
newTrainFcn = 'trainlm';
net = subsasgn(net, struct('type', '.', 'subs', 'trainFcn'), newTrainFcn);
% Assign a new value to the 'layers' field of the network
newLayers = [15 7];
net = subsasgn(net, struct('type', '.', 'subs', 'layers'), newLayers);
```
In the above example, we first create a feedforward neural network `net` using the `feedforwardnet` function. Then, we use `subsasgn` to assign a new value to the `'trainFcn'` field and the `'layers'` field of the network.
Note that in the `subsasgn` function, we use a structure with fields `'type'`, `'subs'`, and the new value to specify the assignment operation. The `'type'` field is set to `'.'` to indicate that we are accessing a field of the object, and the `'subs'` field specifies the name of the field we want to assign.
You can adapt this example to assign other fields of a neural network based on your specific requirements.
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