how to save filename from string

Hi,

If I can same a string in a variable, is it possible to save a file name with this variable string, such that each time I run a loop, I can save the file name with a different name ?

The idea is shown below. Please ignore any syntax as I am trying to determine that

num = 'first'
rfwrite(first4portsparam, ' "the string num here ".s4p')

So in next loop I will replace

num = 'second'
rfwrite(first4portsparam, ' "the string num here ".s4p')

so in the end I will have 2 files first.s4p and second.s4p

Thanks !

[Akira Agata]

How about saving files using "prefix + serial number" as a file name, such as a001.s4p, a002.s4p,...?

[Leojik Kannathara]

Hi Akira,

I thought about that, but I am not sure how to get a serial number into a file name, without manually adding it.

I am very new to Matlab and I am pretty sure I am not aware of certain functions that I could maybe possibly use to do this.

I had previously create a variable "i" and had a for loop where i was incremented from 0 to 4.

Bu I have not found a way to save out a file name each time as you mentioned a001, a002 etc each time "i" increments.

So I had to resort to creating 4 instances of the same code in a if else statement looking at different values of "i" and then save files as different names in each section. Example shown below:

i=0;

a=1;

b=2;

x2= ((N/2)+1);

y2= ((N/2)+2);

while i < N/4

n2m = [a x2 b y2]

if (i==0)

% The First 4 ports

%n2m = [1 9 2 10];

z0 = nport.Impedance;

first4port = snp2smp(nport.Parameters,z0,n2m,z0);

first4portsparam = sparameters(first4port,freq,z0)

rfwrite(first4portsparam, 'FirstChannel.s4p')

figure(1)

rfplot(first4portsparam,2,1)

hold on

rfplot(first4portsparam,4,3,'-r')

title('4-Port S-Parameter')

hold off

elseif (i==1)

% The Second 4 ports

%n2m=[3 11 4 12];

z0 = nport.Impedance;

second4port = snp2smp(nport.Parameters,z0,n2m,z0);

second4portsparam = sparameters(second4port,freq,z0)

rfwrite(second4portsparam, 'SecondChannel.s4p')

figure(2)

rfplot(second4portsparam,2,1)

hold on

rfplot(second4portsparam,4,3,'-r')

title('4-Port S-Parameter')

hold off

increment i in the end of the if else statement

Answer 1

[ES]

% This will save files like 1.s4p, 2.s4p, 3.s4p and so on
for iLoop=1:NumberOfFiles
    rfwrite(first4portsparam, [num2str(iLoop),'.s4p']);
end

[Leojik Kannathara]

Thank you. The Answer by ES helped solve my issue. You can ignore my previous reply to Akira. Thanks to both of you guys !