Re: [Discuss-gnuradio] Sine wave of only 3 cycles
On Thu, Jan 30, 2014 at 10:22 PM, Activecat active...@gmail.com wrote: Dear Sirs, But, another problem arisen. There is a WX GUI Scope Sink in the middle of the flow-graph to plot the instantaneous reading. When the data stream stop by the Head Block, says, at time=t1, the WX GUI Scope Sink starts to show zero reading. The question is, how to see the plot between time=0 and time=t1 ? The workaround is to save the data into a file, then plot it using external tool. This is off-line approach. Is there any online approach that doesn't require any external plotting tool, to view the GUI plot between time=0 and time=t1, after the Head Block terminates the data stream? Regards, activecat You can try to use the QTGUI tools instead of the WX ones. When the data stops, the QTGUI sinks should not update, so it will show you the last plotted samples. But be aware that it's a sampling approach to plotting. Basically, it waits for enough samples to plot one full graph (1024 by default), so it needs to see this amount before it'll update. However, since you're stopping the flowgraph, don't be afraid of the off-line approach. That might be the best way to go. The on-line approach is designed for streaming data, so what you're asking to do is a bit of a different situation that we'd normally work with. Also, note that we ship a handful of off-line plotting tools with GNU Radio. There's a set called gr_plot_* that use scipy and Matplotlib to plot the graphs. I made some newer ones called gr_*_plot_* that uses QT. There not full-featured and may be a bit buggy, but the idea with these is to have a common feel and UI between using the QTGUI sinks inside a flowgraph and these off-line plotting tools. Tom On Thu, Jan 30, 2014 at 9:47 PM, Activecat active...@gmail.com wrote: Dear Sirs, Thank you very much. The head block solve my problem precisely. Note: The flow graph consists of some other blocks at the middle. Regards, activecat. On Thu, Jan 30, 2014 at 8:18 PM, Marcus Müller mar...@hostalia.de wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Also, to do basic mathematical tasks you don't have to rely on GNU Radio, which is a fine signal processing framework but not so much a math environment. If you want to have a three period sine signal, the python is short #import numpy as np f_sin = 1.0 f_sample = 16.0 periods = 3.0 s_per_period = f_sample/f_sin sinevalues = np.sin(np.linspace(0, periods*2*np.pi, periods*s_per_period) ) sinevalues.astype(np.float32).tofile(filename) this will be the same data format as written by the file sink. Greetings Marcus On 30.01.2014 13:02, Felix W. wrote: Hi, you can use a Head block to make the sample stream stop after a given number of samples. Just calculate how many samples there will be in three cycles and set the Head block's parameter accordingly. Greetings Felix 2014-01-30 Activecat active...@gmail.com: Dear Sir, A block of Signal Source (Sine) generates sine wave continuously. How to make it just generates 3 wave-cycle and then stop generating immediately. At the end of the flow-graph there is a File Sink. This captures data for offline processing. Regards, active...@gmail.com ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio -BEGIN PGP SIGNATURE- Version: GnuPG v1 Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJS6kMXAAoJEAFxB7BbsDrLvCsH/RT3cjGEe+/F/xZKATXhcT/N KXTcGJlR3otmGA3EUU79IF7Veel9LFBlhUXIU1OhCPn3n8QpAS0KBzTW5cBatHDb HsD+IRZcYN3GkpqYXwpCtaLMNJgDKuHpPXxVwg3CMOXFB6LrJ8eZmB18TGplPv0x +N/ijjpRXyFOUwMMyC+vQbGGWkYfEFF3tlwf7Wnt9B5E8+cevVDoTOo4/zGfInv8 n6Ww57l7/uxRncBN+eiKdjShWhVD9xKYkonghvJJ05TBRyy4D5IODQJqo8iZlcgA 0Q6DHZAPiBgr5rTzbAenHx48RIls7j6+HSEtMDXrHkfRrdOuYxZDgMAh8rDXXgo= =j9iF -END PGP SIGNATURE- ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Sine wave of only 3 cycles
Dear Sir, A block of Signal Source (Sine) generates sine wave continuously. How to make it just generates 3 wave-cycle and then stop generating immediately. At the end of the flow-graph there is a File Sink. This captures data for offline processing. Regards, active...@gmail.com ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Sine wave of only 3 cycles
Hi, you can use a Head block to make the sample stream stop after a given number of samples. Just calculate how many samples there will be in three cycles and set the Head block's parameter accordingly. Greetings Felix 2014-01-30 Activecat active...@gmail.com: Dear Sir, A block of Signal Source (Sine) generates sine wave continuously. How to make it just generates 3 wave-cycle and then stop generating immediately. At the end of the flow-graph there is a File Sink. This captures data for offline processing. Regards, active...@gmail.com ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Sine wave of only 3 cycles
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Also, to do basic mathematical tasks you don't have to rely on GNU Radio, which is a fine signal processing framework but not so much a math environment. If you want to have a three period sine signal, the python is short #import numpy as np f_sin = 1.0 f_sample = 16.0 periods = 3.0 s_per_period = f_sample/f_sin sinevalues = np.sin(np.linspace(0, periods*2*np.pi, periods*s_per_period) ) sinevalues.astype(np.float32).tofile(filename) this will be the same data format as written by the file sink. Greetings Marcus On 30.01.2014 13:02, Felix W. wrote: Hi, you can use a Head block to make the sample stream stop after a given number of samples. Just calculate how many samples there will be in three cycles and set the Head block's parameter accordingly. Greetings Felix 2014-01-30 Activecat active...@gmail.com: Dear Sir, A block of Signal Source (Sine) generates sine wave continuously. How to make it just generates 3 wave-cycle and then stop generating immediately. At the end of the flow-graph there is a File Sink. This captures data for offline processing. Regards, active...@gmail.com ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio -BEGIN PGP SIGNATURE- Version: GnuPG v1 Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJS6kMXAAoJEAFxB7BbsDrLvCsH/RT3cjGEe+/F/xZKATXhcT/N KXTcGJlR3otmGA3EUU79IF7Veel9LFBlhUXIU1OhCPn3n8QpAS0KBzTW5cBatHDb HsD+IRZcYN3GkpqYXwpCtaLMNJgDKuHpPXxVwg3CMOXFB6LrJ8eZmB18TGplPv0x +N/ijjpRXyFOUwMMyC+vQbGGWkYfEFF3tlwf7Wnt9B5E8+cevVDoTOo4/zGfInv8 n6Ww57l7/uxRncBN+eiKdjShWhVD9xKYkonghvJJ05TBRyy4D5IODQJqo8iZlcgA 0Q6DHZAPiBgr5rTzbAenHx48RIls7j6+HSEtMDXrHkfRrdOuYxZDgMAh8rDXXgo= =j9iF -END PGP SIGNATURE- ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Sine wave of only 3 cycles
Dear Sirs, Thank you very much. The head block solve my problem precisely. Note: The flow graph consists of some other blocks at the middle. Regards, activecat. On Thu, Jan 30, 2014 at 8:18 PM, Marcus Müller mar...@hostalia.de wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Also, to do basic mathematical tasks you don't have to rely on GNU Radio, which is a fine signal processing framework but not so much a math environment. If you want to have a three period sine signal, the python is short #import numpy as np f_sin = 1.0 f_sample = 16.0 periods = 3.0 s_per_period = f_sample/f_sin sinevalues = np.sin(np.linspace(0, periods*2*np.pi, periods*s_per_period) ) sinevalues.astype(np.float32).tofile(filename) this will be the same data format as written by the file sink. Greetings Marcus On 30.01.2014 13:02, Felix W. wrote: Hi, you can use a Head block to make the sample stream stop after a given number of samples. Just calculate how many samples there will be in three cycles and set the Head block's parameter accordingly. Greetings Felix 2014-01-30 Activecat active...@gmail.com: Dear Sir, A block of Signal Source (Sine) generates sine wave continuously. How to make it just generates 3 wave-cycle and then stop generating immediately. At the end of the flow-graph there is a File Sink. This captures data for offline processing. Regards, active...@gmail.com ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio -BEGIN PGP SIGNATURE- Version: GnuPG v1 Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJS6kMXAAoJEAFxB7BbsDrLvCsH/RT3cjGEe+/F/xZKATXhcT/N KXTcGJlR3otmGA3EUU79IF7Veel9LFBlhUXIU1OhCPn3n8QpAS0KBzTW5cBatHDb HsD+IRZcYN3GkpqYXwpCtaLMNJgDKuHpPXxVwg3CMOXFB6LrJ8eZmB18TGplPv0x +N/ijjpRXyFOUwMMyC+vQbGGWkYfEFF3tlwf7Wnt9B5E8+cevVDoTOo4/zGfInv8 n6Ww57l7/uxRncBN+eiKdjShWhVD9xKYkonghvJJ05TBRyy4D5IODQJqo8iZlcgA 0Q6DHZAPiBgr5rTzbAenHx48RIls7j6+HSEtMDXrHkfRrdOuYxZDgMAh8rDXXgo= =j9iF -END PGP SIGNATURE- ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Sine wave of only 3 cycles
Dear Sirs, But, another problem arisen. There is a WX GUI Scope Sink in the middle of the flow-graph to plot the instantaneous reading. When the data stream stop by the Head Block, says, at time=t1, the WX GUI Scope Sink starts to show zero reading. The question is, how to see the plot between time=0 and time=t1 ? The workaround is to save the data into a file, then plot it using external tool. This is off-line approach. Is there any online approach that doesn't require any external plotting tool, to view the GUI plot between time=0 and time=t1, after the Head Block terminates the data stream? Regards, activecat On Thu, Jan 30, 2014 at 9:47 PM, Activecat active...@gmail.com wrote: Dear Sirs, Thank you very much. The head block solve my problem precisely. Note: The flow graph consists of some other blocks at the middle. Regards, activecat. On Thu, Jan 30, 2014 at 8:18 PM, Marcus Müller mar...@hostalia.de wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Also, to do basic mathematical tasks you don't have to rely on GNU Radio, which is a fine signal processing framework but not so much a math environment. If you want to have a three period sine signal, the python is short #import numpy as np f_sin = 1.0 f_sample = 16.0 periods = 3.0 s_per_period = f_sample/f_sin sinevalues = np.sin(np.linspace(0, periods*2*np.pi, periods*s_per_period) ) sinevalues.astype(np.float32).tofile(filename) this will be the same data format as written by the file sink. Greetings Marcus On 30.01.2014 13:02, Felix W. wrote: Hi, you can use a Head block to make the sample stream stop after a given number of samples. Just calculate how many samples there will be in three cycles and set the Head block's parameter accordingly. Greetings Felix 2014-01-30 Activecat active...@gmail.com: Dear Sir, A block of Signal Source (Sine) generates sine wave continuously. How to make it just generates 3 wave-cycle and then stop generating immediately. At the end of the flow-graph there is a File Sink. This captures data for offline processing. Regards, active...@gmail.com ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio -BEGIN PGP SIGNATURE- Version: GnuPG v1 Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJS6kMXAAoJEAFxB7BbsDrLvCsH/RT3cjGEe+/F/xZKATXhcT/N KXTcGJlR3otmGA3EUU79IF7Veel9LFBlhUXIU1OhCPn3n8QpAS0KBzTW5cBatHDb HsD+IRZcYN3GkpqYXwpCtaLMNJgDKuHpPXxVwg3CMOXFB6LrJ8eZmB18TGplPv0x +N/ijjpRXyFOUwMMyC+vQbGGWkYfEFF3tlwf7Wnt9B5E8+cevVDoTOo4/zGfInv8 n6Ww57l7/uxRncBN+eiKdjShWhVD9xKYkonghvJJ05TBRyy4D5IODQJqo8iZlcgA 0Q6DHZAPiBgr5rTzbAenHx48RIls7j6+HSEtMDXrHkfRrdOuYxZDgMAh8rDXXgo= =j9iF -END PGP SIGNATURE- ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
