Alternate instruction in scilab for filtic in matlab

Regarding use of filter instruction we have problem . The program runs well if there are no initial conditions. But we are not finding an alternative for instruction filtic ( matlab ) in scilab . Can you please help us. I have attached the codes
```clc;
clear;
// Difference equation is y[n]+3y[n-1]=x[n]+x[n-1]; x[n]=(1/2)^n u[n];y(-1)=2
n = 0:3;
a =[1 3]; //left hand side of difference equation
b =[1 1]; //right hand side of difference equation
yi=;
xi=0;
x=(1/2).^n;
y=filter(b,a,x,yi)
plot2d3(n,y,1)
plot(n,y,'r.')```

Scilab 23-02-18, 2:17 p.m. Raji
Please install the FOSSEE Signal Processing Toolbox- https://scilab.in/fossee-scilab-toolbox/signal-processing-toolbox. The installation instructions are given. filtic function is available in the toolbox. Please post any bugs or error that you may encounter.
23-02-18, 2:45 p.m. shamika
The link which is given by you is not working

23-02-18, 3:40 p.m. Raji

23-02-18, 3:45 p.m. shamika

23-02-18, 3:58 p.m. Raji
Please check again. It seems to be working at our end.

23-02-18, 7:34 p.m. shamika
Hello Raji,
Here is a click-able link just in case you are making a mistake in copying the link.
https://scilab.in/fossee-scilab-toolbox/signal-processing-toolbox

```Thank you Shamika, I used the function filtic provided in signal processing tool box as shown below, but i am getting errorclc;
// Difference equation is y[n]+3y[n-1]=x[n]+x[n-1]; x[n]=(1/2)^n u[n];y(-1)=2
n = 0:3;
a =[1 3]; //left hand side of difference equation
b =[1 1]; //right hand side of difference equation
y=;
x=0;
x=(1/2).^n;
zi=filtic(b,a,y,x);
y1=filter(b,a,x,[zi])
plot2d3(n,y1,1)
plot(n,y1,'r.')Error!--error 4 Undefined variable: calloctaveat line      34 of function filtic called by :  zi=filtic(b,a,y,x);at line      10 of exec file called by :    exec('C:\Users\admin\Documents\DSP\test2.sce', -1) ```

24-02-18, 11:27 a.m. Raji
Please follow the instructions given here- https://scilab.in/fossee-scilab-toolbox/signal-processing-toolbox . We can only support Ubuntu 14.04 installation for now.

24-02-18, 10:30 p.m. shamika
working on windows any other solution

26-02-18, 10:23 a.m. Raji
Sorry not at the moment. We will let you know one we've released the Windows version.

26-02-18, 11:57 a.m. shamika