What are the spike removal techniques in matlab without using filters output from wavelet filter using daubechies 4 wavelet.

Using wavelet filter this is the output obtained. The problem is elimination of the spikes at 0.023,0.043,0.063 and so on. Please note: no predefined filters present in simulink and dsp toolbox are to be used. Kindly suggest an alternative method to remove the spikes.
based on your results, you can try a median filter, in Matlab - medfilt1; which takes n-length samples of your series x at a time and computes the median, and apply the median value to each value of x. It is a very common non-linear filtering technique. 

try something like 

result = medfilt1(signal,6)


you and alter the length of evaluation from 6 to whichever number suits the data.