Search found 14 matches

by srene
Thu May 01, 2014 1:32 pm
Forum: Modeling networks
Topic: synapses seem to have no influence
Replies: 3
Views: 5963

Re: synapses seem to have no influence

Sorry that I didn´t mention that. For the weight of the synapses I varied the value of course. I tried following weights: weight = 0.7 weight = 0.9 weight = 10 weight = 100 Now the last two values may be unrealistic but It was on purpose. I think the there exists synapses resp. there is connectivity...
by srene
Wed Apr 30, 2014 9:04 am
Forum: Modeling networks
Topic: synapses seem to have no influence
Replies: 3
Views: 5963

synapses seem to have no influence

Hello, Iḿ working on a network model of cells of one template. Each cell is connected by gaps and synapses. Then a part of the cells will be stimulated in order to make the whole network firing synchronously. The way of connecting with synapses is shown in the code above: nZellen = 100 // number of ...
by srene
Wed Apr 30, 2014 6:54 am
Forum: Other questions
Topic: random number generation - set start random number
Replies: 1
Views: 1061

random number generation - set start random number

Hello, I've got a question setting random numbers. If I use s.th. like this startcell = int(r.uniform(0,100)) This code is inside a for loop so it selects as many random numbers as I want the for loop to do. Is there a possibility the set the first random number of the random number generation proce...
by srene
Wed Dec 11, 2013 8:13 am
Forum: Modeling networks
Topic: Stimulating current similar to a half wave rectification
Replies: 10
Views: 9475

Re: Stimulating current similar to a half wave rectification

Hello Ted, there is another question. My stim is now Ihw.. is there a possibility to change the amp but of course keeping the frequency? When i use an IClamp I can use this: nStimuli= 3 // would give me three stim nStim = 30 // would stimulate 30 cells each three times Frequenz = 80 // Hz T=(1/Frequ...
by srene
Tue Dec 10, 2013 3:06 pm
Forum: The GUI
Topic: Saving Graphs automatically
Replies: 3
Views: 5661

Re: Saving Graphs automatically

Thanks Ted for your quick response.

I plan to do this many times. That´s why I don´t want to click so much in the Print & File Manager Window on Select -> Move -> Print -> and so on.

srene
by srene
Tue Dec 10, 2013 8:40 am
Forum: The GUI
Topic: Saving Graphs automatically
Replies: 3
Views: 5661

Saving Graphs automatically

Hello Ted, i wanted to ask if it is possible to write s.th. in my .hoc file so that the graphs that will be plotted, while the hoc file runs, will be saved automatically. i mean I know that I can save data from the run like explained in the Tutorial: http://www.anc.ed.ac.uk/school/neuron/ But is the...
by srene
Sun Oct 06, 2013 8:15 am
Forum: Other questions
Topic: "subscript out of range" error
Replies: 3
Views: 3298

Re: "subscript out of range" error

To explain my problem , I think it`s better to post this here. [Moderator's comment: This thread started as a post to a different thread that addressed a very different topic. It was split off into a new thread for the sake of clarity, which is ill served if each thread is free to wander all over co...
by srene
Wed Oct 02, 2013 8:08 am
Forum: Other questions
Topic: "subscript out of range" error
Replies: 3
Views: 3298

"subscript out of range" error

In my hoc file I managed to write a .dat file to save the Information. Everything worked when I runned the hoc-file. After three runs with different frequencies, I runned it again with higher frequency. schreibe_dat() // is the proc to write the dat and worked The terminal said: /Applications/NEURON...
by srene
Tue Sep 24, 2013 7:56 am
Forum: Other questions
Topic: Changing a graph's axis scales
Replies: 1
Views: 2144

Changing a graph's axis scales

Hello,

if I want to plot voltage over time, I select Neuron Main Menu -> Graph-> Voltage axis and there pops up a window. V: -80 mV to +40 mV t: 0s to tstop.

Is there a easy way to change the limits of the y-Axis. V: -120 mV to +40 mV e.g..
by srene
Tue Sep 24, 2013 5:01 am
Forum: Modeling networks
Topic: Stimulating current similar to a half wave rectification
Replies: 10
Views: 9475

Re: Stimulating current similar to a half wave rectification

Thank you again. Now there is one more thing... I want to use a control variable j. j is the number of stimuli or the peaks of current. Therefore I need Pi π to do s.th. like this.... dur = 200 // Duration of Stimulation (ms) Frequenz= 30 // frequency (Hz) f= Frequenz*(2*???Pi???) // frequency (radi...
by srene
Tue Sep 17, 2013 7:46 am
Forum: Adding new mechanisms and functions to NEURON
Topic: potassium channel: k_ion mechanism not inserted
Replies: 1
Views: 1574

potassium channel: k_ion mechanism not inserted

Hello, I have following problem. I have an kalium.mod file (I use Mac OS X Lion): TITLE ich versuch mich mal... UNITS { (mA) = (milliamp) (mV) = (millivolt) } PARAMETER { v (mV) celsius (degC) gkbar = 0.07 (mho/cm2) vhalfm = -3 (mV) vhalfh = -51 (mV) km = 10 (1) kh = -12 (1) ek } NEURON { SUFFIX kal...
by srene
Wed Sep 04, 2013 6:02 am
Forum: Modeling networks
Topic: Stimulating current similar to a half wave rectification
Replies: 10
Views: 9475

Re: Stimulating current similar to a half wave rectification

Thanks again, it´s checked now... Is it possible to change the gap between two pulses of ihw? Like in the example i can change the distance between two square pulses by adding s.th. to the delay and multiplying it with the control variable j: for j = 0, nStimuli-1 { for i = 0, nStim-1 Zellen[i].soma...
by srene
Sun Aug 25, 2013 8:46 am
Forum: Modeling networks
Topic: Stimulating current similar to a half wave rectification
Replies: 10
Views: 9475

Re: Stimulating current similar to a half wave rectification

Hello Ted,

thank you very much for responding that early. I thought I would get an email whenever someone answers so I´m late. I will try it.
by srene
Wed Aug 21, 2013 6:32 am
Forum: Modeling networks
Topic: Stimulating current similar to a half wave rectification
Replies: 10
Views: 9475

Stimulating current similar to a half wave rectification

Hello, I have a working network of 500 cells. I want to test synchrony of firing in the network. For that I want to stimulate about 20 % (100 cells) ore more to test the network. I already can do this by putting an IClamp on a random chosen cells, stimulating with a square pulse (see example above)....