How can I calculate the Euclidean distance? and to do this, how do I determine a graph as a variable

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Helen 2013-8-28

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https://ww2.mathworks.cn/matlabcentral/answers/85801-how-can-i-calculate-the-euclidean-distance-and-to-do-this-how-do-i-determine-a-graph-as-a-variable

This is the code used to calculate different spike patterns changing gKmax and gNamax, how do i calculate the distance when the values are changed?

function [ time m h n v ]= finished(gKmax,gNamax) % returns the voltage of a HH neuron model in v % t is atime vector % m is the sodium activation % delta_t is the timestep % external current % number of iterations Iext=0.6; membrane_capacitance=0.01; delta_t=0.001; n_iteration=100000; %constant values ENa=-55.17-60; EK=+72.14-60; El=-10.58;

%maximum conductances

gLmax=0.003;

%initial conditions vm(1)=0; %membrane voltage to begin with v(1)=vm;

%alpha and beta values alpha_n=0.01*(vm+10)/(exp((vm+10)/10)-1); beta_n=0.125*exp(vm/80); alpha_m=0.1*(vm+25)/(exp((vm+25/10))-1); beta_m=4*exp(vm/18); alpha_h=0.07*exp(vm/20); beta_h=1/(exp(vm+30/10)+1);

%starting values for n m and h infinity_n=alpha_n/(alpha_n+beta_n); infinity_m=alpha_m/(alpha_m+beta_m); infinity_h=alpha_h/(alpha_h+beta_h);

% loop for calculation for i=1:n_iteration,

    delta_m=delta_t*(alpha_m*(1-infinity_m)-beta_m*infinity_m);
    delta_n = delta_t*(alpha_n*(1-infinity_n)-beta_n*infinity_n);
    delta_h = delta_t*(alpha_h*(1-infinity_h)-beta_h*infinity_h);
    infinity_m = infinity_m + delta_m;
    infinity_n = infinity_n + delta_n;
    infinity_h = infinity_h + delta_h;
    gNa = gNamax*infinity_m^3*infinity_h;
    gK = gKmax*infinity_n^4;
    gL = gLmax;
    INa = gNa*(vm-ENa);
    IK = gK*(vm-EK);
    Il = gL*(vm-El);
    dvm = (delta_t/membrane_capacitance)*(-Iext-( INa + IK + Il));
    vm = vm + dvm;
    v(i+1) = vm;
m(i+1)= infinity_m;
h(i+1)= infinity_h;
n(i+1)= infinity_n;

alpha_n=0.01*(vm+10)/(exp((vm+10)/10)-1); beta_n=0.125*exp(vm/80); alpha_m=0.1*(vm+25)/(exp((vm+25)/10)-1); beta_m=4*exp(vm/18); alpha_h=0.07*exp(vm/20); beta_h=1/(1+exp(0.1*(vm+30))); end v= -v-60;

time = delta_t*(1:n_iteration+1);

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dpb 2013-8-28

At the little blue circle w/ the "?" in it and the "Help" word beside it, maybe???

Please correct spelling of "Euclidean" -- tags won't be of any value misspelled in particular.

Jan 2013-8-29

编辑：Jan 2013-8-29

@Helen: It appears on top of the input dialog field when you insert a new message or editing an existing one. It is on the right of the buttons, which can be used for formatting: [B], [I], [Aa], [Link-icon], etc. The topic of formatting in the forum has been discussed such often, that you can surely find it by using the Search field also.

It is frustrating, that TMW hesitates to present e.g. http://www.mathworks.com/matlabcentral/answers/13205-tutorial-how-to-format-your-question-with-markup for newcomers automatically, but let the contributor explain this every day again and again.

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