Mathias Bank

This blog is written in english. The reason is simple: I want to improve my english. So there are surely some mistakes in my texts.

Benedikt D. has spent some time to mark mistakes in my previous posts. I can see in this way, what’s wrong and I will correct them. I think, that’s the best way to become better.

A big “Thank You” for your help!

Today Postbank, Sparkassen and Volksbank have given a presentation about their new paying system. With this system, it should be easier to buy things from other pages. It works like paypal’s system except that users don’t have a seperate account.

Ok, this message is quite interesting for me. So I followed the given link to get more information: giropay.de. But what’s that? I can only see the logo of giropay. Wasn’t there any money to create a webpage for the new project? It’s unbelievable that there is no further information on the webpage. If the system will work like the marketing campaign, the system will not be used by any user.

[Update] 

Now, they have achieved to put content on their website. But I cannot find further information than I have read in other pressing texts. It seems that I can only use giropay with paypal. I cannot see any sense because I was able to use paypal before. Perhaps I have just to wait some days. Really bad marketing! You have to give more informationen about your service when it’s talked about. In a few days, noone will talk about giropay.

For a practical course I have used a Wacom tablet to write some characters. The goal is to recognize these handwritten characters with the help of a mlp.

So far, I have written the characters using my mouse. But this was not as fast and good as with this tablet. I have just created 29 Sample-Sets (each with 62 Samples) in just one hour. I think, that’s a fantastic job.

Perhaps I will buy such a tablet for my own work especially in graphics. This will surely improve my work .

Ok, I have achieved to create a small sample in Torch3. Cause of the bad documentation, I have just tried to build a multi layer perceptron for a xor-problem. As we should know, this problem can only be solved with at least one hidden layer and not by a simle perceptron.

Ok, the first problem was: how can I build a sample file. As I have seen in a tutorial, there exists a function to load simple ASCII-files. But there was no description on how to build them. But that’s really simple:

In the first line, there has to be to integers: the first specifies the number of examples, the second number specifies the number of datapoints in each example. Each sample exists of the input data and the output data. Each one is seperated by blank. The xor-problem can be seen in this sample-file. This file can be simple loaded:

MatDataSet *data = new(allocator) MatDataSet("XOR-ProblemData.txt", 2, 1);

The first parameter specifies the sample file. The second specifies the number of input data and the last number specifies the number of the output data. So in the xor-problem we have to inputs and one output.

And now, the complete source of our program. I think, it needn’t to be explained. If you have read the tutorial, it’s just easy to unterstand, what is done.

I hope, this short sample helps others who want to start with Torch3.

I was really happy when google put the page of bmw.de out of their index (look at heise.de). BMW used doorway-pages. This means, that they have presented other contents to the user as to google robots. So, google has seen a lot of “interesting words”, so bmw was listed at better places.

Today, BMW is back joined again. What have they done? They have simly replaced the “interesting words”. But without JavaScript, there is still another content. This let me think two things:

• There must be really stupid web-programmers and webdesigners who have no idea how the www works. It’s interesting that this people get jobs at such big firms like BMW. That says to me: all you have to do is sale you well! It doesn’t matter what you really can.
• Google can be really fast. My pages are not as fast listed as bmw.de. Untill now, I have thought Google to be a fair company. But now, I have to think, that even at google money is more than it should be.