Boost serialization
Yea the .save and .load works but unfortunately not for my use case. I'd like to save everything (including the class example above and other standard data types) into one binary file. I tried to use the non-intrusive way from the tutorial but have been getting errors for the last two days:
Code:
Errors:
Do you perhaps know where I am going wrong here?
Code:
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Errors:
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Do you perhaps know where I am going wrong here?
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n_{cols,rows,elems} are constant, you may save them to the file, but cannot load into them
don't have armadillo so cannot test it, but the idea would be something like
that should work for dense matrices
if you use sparse matrices, then check the interface to obtain the <row, col, value> tuple for each element and serialize that.
don't have armadillo so cannot test it, but the idea would be something like
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if you use sparse matrices, then check the interface to obtain the <row, col, value> tuple for each element and serialize that.
Thanks a ton ne555. I'm going to try this stuff out right now. Curious though, why does it matter that they are constants? That would make it very easy to save (already works as you said) and load, right? Is this the reason why my way with
Also, couldn't I just use
?
If not, why would we need pointers to save the elements? Thanks again ne555!
void serialize(Archive & ar, arma::mat &m, const unsigned int version) wouldn't work? I just followed the non-intrusive way in the tutorial and it should have worked. Again, apologies if this sounds like a "rtfm" question...I've read the tutorial and I've been googling and haven't found a reason for this.Also, couldn't I just use
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If not, why would we need pointers to save the elements? Thanks again ne555!
> why does it matter that they are constants?
a constant cannot be modified
about your last code, ¿how is `data' related to your matrix?
now read http://arma.sourceforge.net/docs.html#memptr
«Obtain a raw pointer to the memory used for storing elements
Caveat: this function is not recommended for use unless you know what you are doing!»
if you are not comfortable with that, then check out the interface of arma::mat to see how to access individual elements
a constant cannot be modified
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about your last code, ¿how is `data' related to your matrix?
now read http://arma.sourceforge.net/docs.html#memptr
«Obtain a raw pointer to the memory used for storing elements
Caveat: this function is not recommended for use unless you know what you are doing!»
if you are not comfortable with that, then check out the interface of arma::mat to see how to access individual elements
Hey ne555, been working on this since you last wrote. I'm trying to get everything under one roof so to speak. My end goal is to have everything in a class (matrices included) and serialize everything or certain aspects of the class. Everything works individually but when I try to add my arma code in the class at the beginning of our discussion, I get errors (primarily regarding the use of a namespace in a class -- from what I've read this is not allowed). Class Car has the arma code in it:
Code:
Any thoughts on how I can make this work?
Code:
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Any thoughts on how I can make this work?
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I suppose my main question is:
In the docs here:
https://www.boost.org/doc/libs/1_47_0/libs/serialization/doc/serialization.html#splittingfreefunctions
Why do we need namespaces in the first place? Could there be a work around for splitting functions without using namespaces?
In the docs here:
https://www.boost.org/doc/libs/1_47_0/libs/serialization/doc/serialization.html#splittingfreefunctions
Why do we need namespaces in the first place? Could there be a work around for splitting functions without using namespaces?
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Ah thanks ne555! I forgot to update my post but I figured it out about an hour ago and it's exactly what you have here. Makes sense that the namespaces should not be within the Car class as it has nothing to do with the Car class.
I am trying to do the same as above but with arma::vec. The code compiles but the post serialization vector doesn't have the same values as the initial vector. Here is the code:
And the result of the two vectors:
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And the result of the two vectors:
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Line 37 in load():
Should be:
Here's the whole thing:
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Should be:
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Here's the whole thing:
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Thanks a ton kbw! I changed my load() to what you have and it works. I have a few questions so I can fully understand your adjustments:
1. why use auto in line 14?
2. what's the purpose of t.zeros? I tried the code without t.zeros and it still works.
3. Outside of changing K<n_elem to K<nelem, the problem with the code was using int rather than size_t. Could you perhaps explain why with size_t it was able to work?
Thanks again!
1. why use auto in line 14?
2. what's the purpose of t.zeros? I tried the code without t.zeros and it still works.
3. Outside of changing K<n_elem to K<nelem, the problem with the code was using int rather than size_t. Could you perhaps explain why with size_t it was able to work?
Thanks again!
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I've modified my structs to include the serialize() function and tried using the same technique used in the tutorial for files with my socket
| 1. why use auto in line 14? |
| 2. what's the purpose of t.zeros? I tried the code without t.zeros and it still works. |
| 3. Outside of changing K<n_elem to K<nelem, the problem with the code was using int rather than size_t. Could you perhaps explain why with size_t it was able to work? |
I've never used boost serialize before (I'm not a fan of boost), and had to learn it tp fix your code, so there may be hidden errors.
| 1. why use auto in line 14? |
Thanks guys for the clarification. I have another addendum to the code where I want to add an abstract class. Essentially, there is an abstract base class with derived classes (expected to have many more than example below) whose attributes I would like to serialize. The thing is, the derived classes will have different attributes. That means the serialization of the derived classes will be different. I am having a few errors come up (see error results on the second post -- reached maximal post length):
Code:
Code:
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Errors need to be posted in two posts now. Too many characters:
Errors.1:
Errors.1:
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Errors.2:
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I figured it runs with this topic and it would save spamming the forum. It also gives a bit of background what I've already tried.
class Porsche : public Car<class Archive>should just be:
class Porsche : public Car<Archive>Similarly, stuff like:
Audi<class Archive>* a = new Audi<class Archive>;should just be:
Audi<Archive>* a = new Audi<Archive>;Fix that, and see which other errors go away too.
Although I don't see any definition of Archive that can be seen by main. Or is that defined in boost?
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