scilab

问题 If I use the Arduino IDE's Serial monitor I can read the pair of comma separated values as below: I want to first replicate this behavior in SciLab terminal. I used the Serial Communication Toolbox: h = openserial(7, "9600,n,8,1") // open COM7 disp(readserial(h)) closeserial(h) which returns either empty or , 169 228, 179 228, 228, 205 228, 209 228, putting the disp(readserial(h)) in a while loop also doesn't help. Not only there are too many empty lines, if I stop the while loop it does not

问题 I have two for loops running in my Matlab code. The inner loop is parallelized using Matlabpool in 12 processors (which is maximum Matlab allows in a single machine). I dont have Distributed computing license. Please help me how to do it using Octave or Scilab. I just want to parallelize 'for' loop ONLY. There are some broken links given while I searched for it in google. 回答1: parfor is not really implemented in octave yet. The keyword is accepted, but is a mere synonym of for (http://octave

问题 I'm trying to make a parameters estimation on Lotka-Volterra model with Scilab (I am a total neophyte). When I try to run the script, Scilab warns about incoherent subtraction. I guess my problem is the same as in this topic, but the solution there uses a Matlab function. Here is my script: // 1. Create Lotka Volterra function function [dY]=LotkaVolterra(t,X,c,n,m,e) IngestC = c * X(1) * X(2) GrowthP = n * X(1) MortC = m * X(2) dY(1) = GrowthP - IngestC dY(2) = IngestC * e - MortC endfunction

问题 I am able to plot a point using the x and y coordinates using the following code. figure(1); plot(x(1),y(1),'o'); h_compound = gce(); h_compound.children.mark_size = 20; h_compound.children.mark_background = 2; h_axes = gca(); h_axes.data_bounds = [0,0;100,100]; My program contains a loop which keeps on refreshing the coordinate values. Every time the loop is executed the point is plotted in the same graphic, such that the new points overlap the older ones. How do I make the old points

问题 How can I solve the second order differential equation using scilab ode() function. (For example: y'' + 3y' +2y = f(x), y(0)=0, y'(0)=0) And then plot the result of function y(x). I want to use this to model the RLC-circuit signal with step-function input Here is the code I tried function y=u(t) y=(sign(t)+1)/2 endfunction L=0.001 R=10 C=0.000001 function zdot=f(t,y) zdot(1)= y(2); zdot(2)=(u(t)-y(1)-L*y(2)/R)/(L*C); endfunction y0=[0,0]; t0=0; t=0:0.00001:0.001; out=ode(y0,t0,t,f); clf();

问题 I am working in Scilab 5.5.2 . I need to write multiple images to a single folder. The images which I want to write are cropped images from a set of inputs. I am able to write a single image to the folder with the following command: imwrite(fname,strcat('C:\Users\dell\Desktop\example_sci\myfolder\1.jpg')); I have put this in a for loop, so the output image is over written and the result is a single image. How can i write all the results to a single folder? 回答1: You should create the paths

问题 I have written a function to find Log(Fn) / n , where Fn is the sequence of Fibonacci numbers F_{n+1} = F_n + F_{n-1} : function [g] = logf(n) u = 0; v = 1; f = v; for i = 2:n do f = u + v; u = v; v = f; end g = log(f) / n; endfunction What I need is to plot this function for 1< n < 200 . 回答1: First all please try to learn MarkDown language to post readable questions. Your first question had some information which was not shown due to the conflicts with StackOverflow's MarkDown rendering.

问题 All, I have made a 3d plot of some colors in the RGB color space. Currently the marks are all the same color. I would like each mark to be the color it represents in the space. So, a mark in the red corner of the plot should be red, etc... The code I have so far is below. Thanks for your help, -Bill // RGB color data for a few shades of pink and red r = [1, 1, 1, 1, 0.8588235294117647, 0.7803921568627451, 1, 0.9803921568627451, 0.9137254901960784, 0.9411764705882353]'; g = [0.7529411764705882

问题 I want to simulate a time series y1 with an AR(p) process, and then solve the differential equation dy/dt = AR(p)(y1) . This is the Scilab code I wrote (the AR coefficients are calculated with the lev() function and then normalized in a part of the code I omitted to keep it short). t = [0:0.1:2*%pi]; y1 = sin(t); C = 1; y2 = -1*cos(t) + C; ar = [1. - 0.0195380 - 0.0154317 - 0.0116690 - 0.0081661 -0.1015448] y1_m = filter(1, ar, y1); //Generates simulated series function y_m = far(t, y, ar, y1

问题 How do I create a csv file with date as the name of the csv file. I tried doing it, but the date won't appear only the name does. The language is Scilab which is similar to Matlab. 回答1: I do not understand your question fully. But following the csvWrite documentation and the date documentation. You could do someting like this filename_with_date_string = date() + ".csv"; directory_path = TMPDIR; // Some matrix you want to save M = [1:10] * 0.1; // Create the file file = fullfile(directory_path