to change the scale of a plotted graph

Hi fellow friends,

I want to change the scale of a graph to a new scale. previous scale is start from 0 with the increment of 0.5. this graph and scale is auto generated from the data. my coding for plotting as below.

       bit_error(1,oye) = sum(m5~=data_topi); % BER
        Eb_No=snr(oye)-3; EbNo=10^(Eb_No/10);

%         fprintf('Looping = %1d, SNR = %1d, BitError = %1d,...
%             jum,snr(oye),bit_error(oye));
%         if snr(oye) == max(snr)
%             display('*****************************');
%         end
    end
    total_bit_error(jum,:) = bit_error;

end

BER = sum(total_bit_error)/(length(m5)*iteration);

figure; % BER vs SNR in linear value
plot(snr,BER,'ro-'); hold on
grid on
xlabel('\fontname{calibri}{SNR}')
ylabel('\fontname{calibri}{BER}')
title('\fontsize{10}{BER vs SNR in Linear Value}')

[Walter Roberson]

Are you referring to the tick marks and tick labels?

What would you like to have show up?

[fiteri razali]

the existing y axis start from 0 scale with the increment of 0.5. i want make it start with 0,0.01,0.02,0.03,0.04,0.05 and so on up to 0.25

[fiteri razali]

yes the tick marked and tick labels..i want it become 0 0.01,0.02 an d so on

Answer 1

[Walter Roberson]

yticks = [0 : 0.01 : 0.25];
set(gca,'YTick', yticks, 'YTickLabel', cellstr(num2str(yticks(:))) );

However, if the current automatic scaling has its first tick at 0.5 then I predict that the result of the above would be to crowd a lot of ticks in to a small portion of the graph.

If the first tick is at 0.5 then your BER must have values that are at least 0.8 (and probably higher.) Do you want the ticks to just stop at 0.25 leaving the rest unlabelled but visible? Do you want the part of the graph above 0.25 to be cut off and only up to 0.25 shown? Do you want the full range of BER values to be plotted, but for the tick labels to "lie" above the values by labeling (e.g.) 1.72 as if it were 0.21 ?

[fiteri razali]

Thanks Walter,

U r rite, the result too crown with a lot of ticks. huhu... Actually I want the tick for Y axis every 0.01 up to the max and not up to 0.25 only(full range of BER value).so that it is easier for me to analyse the data more accurately.help please.