Hi, finally I could able to find a solution myself.
I used optimset to set the value of display to OFF then passed the options to lsqcurvefit. Did the job. It switch off the repeitative display and in the command window I used it to display more important msg like percentage of completion, points where function deviate from my set limit etc.
options = optimset('Display','off');
[x,resnorm] = lsqcurvefit(@myfun,x0,xdata,ydata,[],[],options);
thank you for showing interest in my question