   b: torch.Tensor</span>
<span class="sd">            Measurement vector of length d</span>
<span class="sd">        nnz: int</span>
<span class="sd">            Maximum number of nonzero coefficients (if None, set to n)</span>
<span class="sd">        Returns</span>
<span class="sd">        -------</span>
<span class="sd">        x: torch.Tensor</span>
<span class="sd">            Vector of length n</span>
<span class="sd">        &quot;&quot;&quot;</span>
        <span class="n">d</span><span class="p">,