• Elkin Cordoba
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I'm really stuck on this one.

For the first part I have:
torch.manual_seed(123)

# TODO: Generate 2 clusters of 100 2d vectors, each one distributed normally, using
# only two calls of randn()
classApoints = torch.randn(100,2)
classBpoints = torch.randn(100,2)
#println(classApoints)

# TODO: Add the vector [1.0,3.0] to the first cluster and [3.0,1.0] to the second.
classApoints += torch.tensor([1.0,3.0])
classBpoints += torch.tensor([3.0,1.0])
#println(classApoints)

# TODO: Concatenate these two clusters along dimension 0 so that the points
# distributed around [1.0, 3.0] all come first
inputs = torch.cat([classApoints, classBpoints],0)
#println(inputs) - I suspect U might be missing something in here but I'm not certain

# TODO: Create a tensor of target values, 0 for points for the first cluster and
# 1 for the points in the second cluster. Make sure that these are LongTensors.
classA = classApoints.zero_().long()
classB = classBpoints.fill_(1).long()
targets = torch.cat([classA, classB])
#println(targets.type()) - pretty sure this is correct and I've confirmed they are LongTensors

For the 2nd part (where I'm having error) I've got:
# TODO: Set the random seed to 123 using manual_seed
torch.manual_seed(123)

# TODO: Initialize a Linear layer to output scores
# for each class given the 2d examples
model = nn.Linear(2, 2)

# TODO: Define your loss function
loss_fn = nn.NLLLoss()

# TODO: Initialize an SGD optimizer with learning rate 0.1
optimizer = torch.optim.SGD(model.parameters(), lr=0.1)

# Train the model for 100 epochs
n_epochs = 1
losses = []
for _ in range(n_epochs):
preds = model(inputs)
#println(preds)
#println(targets)
loss = loss_fn(preds, targets)
losses.append(loss)
loss.backward()
optimizer.step()
print(f'Anwswer to Exercise 6: Loss after {n_epochs} epochs: {losses[-1]}')

iterations = np.arange(len(losses))
_ = plt.plot(iterations, losses, '', iterations, losses, '-')

The error I'm getting:
--------------------------------------------------------------------------- RuntimeError Traceback (most recent call last) <ipython-input-65-b59a439a8791> in <module>() 20 #println(preds) 21 #println(targets) ---> 22 loss = loss_fn(preds, targets) 23 losses.append(loss) 24 loss.backward() /usr/local/lib/python3.6/dist-packages/torch/nn/modules/module.py in __call__(self, *input, **kwargs) 489 result = self._slow_forward(*input, **kwargs) 490 else: --> 491 result = self.forward(*input, **kwargs) 492 for hook in self._forward_hooks.values(): 493 hook_result = hook(self, input, result) /usr/local/lib/python3.6/dist-packages/torch/nn/modules/loss.py in forward(self, input, target) 191 _assert_no_grad(target) 192 return F.nll_loss(input, target, self.weight, self.size_average, --> 193 self.ignore_index, self.reduce) 194 195 /usr/local/lib/python3.6/dist-packages/torch/nn/functional.py in nll_loss(input, target, weight, size_average, ignore_index, reduce) 1330 .format(input.size(0), target.size(0))) 1331 if dim == 2: -> 1332 return torch._C._nn.nll_loss(input, target, weight, size_average, ignore_index, reduce) 1333 elif dim == 4: 1334 return torch._C._nn.nll_loss2d(input, target, weight, size_average, ignore_index, reduce) RuntimeError: multi-target not supported at /pytorch/aten/src/THNN/generic/ClassNLLCriterion.c:22

Can anyone assist on this?
• December 28, 2018
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• 0
I'm stuck on step #2 of Einstein Analytics and Discovery Insights Specialist superbadge.  I'm getting this warning while checking the challenge:

The step "Churn Tenure' is in compact form, so the filter values need to be specifed as a minimum and maximum
The static step that feeds has the following the value:

```"Tenure_Length": {
"label": "Tenure Length",
"selectMode": "single",
"type": "staticflex",
"values": [
{
"display": "High Risk",
"value": "1 to 12 months",
"min": 1,
"max": 12
},
...
]
}```

I'm using selection binding for min and max values.  The dashboard is correctly filtering:

Any ideas?
I've tried a non-compact form step where I inject a saql fragment into the query, as well as where I inject min/max values using a range filter serialization...All these efforts end in the same challenge failure message.

Any help/suggesitions are welcome!
Hi guys,
We just created a library named R.apex, which helps simplify the common tasks in apex code development by adopting a functional style.
It offers tons of utility functions to work with lists, sets, maps and sobjects, making apex code clean and readable. We were suffering from the pain points of writing similar Apex code to complete trivial tasks once and once again, and that is the reason why we want to stop that and start to write reusable code. Here are some examples of what R.apex can do:

```// Reverse a list
List<Integer> reversedList = R.of(new List<Integer>{ 1, 2, 3 })
.reverse()
.toIntegerList();```

```// Fina specific account
List<Account> accountList = ...;
Account acc = (Account)R.of(accountList)
.find(R.whereEq.apply(new Map<String, Object>{
'LastName' => 'Wilson',
'IsDeleted' => false
}))
.toSObject();```

Hopefully R.apex can help make your Apex code development easier, and you are always welcome to give feedback so that we can improve it.

R.apex is an open source project hosted at https://github.com/Click-to-Cloud/R.apex/.
You can check it out. Feel free to clone it, make changes or submit a PR.

^_^
...I have not done the multiple choice exam yet.  Is that an issue?  Can I do the trailhead requirements first or at least continue for a while and then take the multiple choice exam or will I have to start all over again after I take the multiple choice exam?
For SFA Field, enter Minimum Support Level.

I only see the Support Level field that was created on the account.  Also, I don't see that this is actually limiting the chosen fields (seems like that was the point of all of the new metadata fields).  Is there something I am doing wrong here, or is the example off?

Also, if anyone has built out a rules engine while referencing metadata, I'd love to see a link to an example of that.
I'm getting this error on Wave Desktop Exploration: Analyze Your Data Over Time.

Challenge Not yet complete... here's what's wrong:
The 'Sales Pipeline Overview' lens does not appear to have the correct query. Please check the requirements and ensure everything is setup correctly.

I've redone the lens several times and checked that I am evaluating on the correct Dev Org.

Any help?

Hi ,

i wrote a query which has an inner query in it to get the child records.

i will give an example with standard objects

Account acc = [select name,(select firtsname,lastname from Contact) from account limit 1];

i am using this "acc" varibale in VF page to display the contact records.

<apex:page>

<apex:repeat value="{!acc.contacts}" var="contact" >

<apex:outputtext value="{!contact.firstname}"/>

<apex:outputtext value="{!contact.lastname}"/>

</apex:repeat>

i have around 130 contacts, but iam getting below error message when i try to open the VF page to view the results.

"Aggregate query has too many rows for direct assignment, use FOR loop "

please let me know if anyone faced this issue earlier. what is the limit of number of rows in aggregate query.

is ithis is the correct way to get this done.

actually in my query there are around 15 inner object queries. that is my parent object has 15 childs.

any help would be appreciated

Regards,

Rakesh

Hi,

Regards

Joao

Hi guys,
We just created a library named R.apex, which helps simplify the common tasks in apex code development by adopting a functional style.
It offers tons of utility functions to work with lists, sets, maps and sobjects, making apex code clean and readable. We were suffering from the pain points of writing similar Apex code to complete trivial tasks once and once again, and that is the reason why we want to stop that and start to write reusable code. Here are some examples of what R.apex can do:

```// Reverse a list
List<Integer> reversedList = R.of(new List<Integer>{ 1, 2, 3 })
.reverse()
.toIntegerList();```

```// Fina specific account
List<Account> accountList = ...;
Account acc = (Account)R.of(accountList)
.find(R.whereEq.apply(new Map<String, Object>{
'LastName' => 'Wilson',
'IsDeleted' => false
}))
.toSObject();```

Hopefully R.apex can help make your Apex code development easier, and you are always welcome to give feedback so that we can improve it.

R.apex is an open source project hosted at https://github.com/Click-to-Cloud/R.apex/.
You can check it out. Feel free to clone it, make changes or submit a PR.

^_^

We are using the Databasedotcom Ruby gem (essentially a REST wrapper) to authenticate to salesforce. The OAuth dance is randomly failing (1 out of 25 attempts) with the following message:

`client identifier invalid`

The code is almost boilerplace code for authentication:

```def self.authenticate(username, password)
client = Databasedotcom::Client.new(config)
begin
{:success => 'true', :message => 'Successful sfdc login.', :access_token => access_token}
rescue Exception => exc
{:success => 'false', :message => exc.message}
end
end```

Any ideas what could be causing it to fail randomly?

Thanks

Jeff Douglas

Appirio & CloudSpokes

http://blog.jeffdouglas.com